IOWL Working Paper - Capacity & Conversion

The Capacity Conundrum
Why more capacity does not automatically produce better outcomes

Government, education, employers, economic-development bodies, workforce planners, regulators, public services, professional bodies and institutional leaders.

Read the perspective > Read the full working paper >

Working revision 2 September 2026 - Version 0.22

The proposition in 30 seconds

IOWL working proposition

Modern societies repeatedly respond to weak outcomes by building more capacity: more education, more skills, more technology, more infrastructure, more funding, more systems and often more regulation. Those investments can be necessary and valuable. They do not, however, determine what that enlarged capacity will become in practice. The Capacity Conundrum names the recurring gap between what people, organisations and institutions are equipped to do and the outcomes they actually realise. IOWL asks whether Calibre - the judgement, integrity, responsibility and behavioural reliability governing the exercise of Capability and Competency - is an under-specified part of that conversion problem.

Capacity creates possibility. It does not determine direction. The unresolved question is what governs the conversion of what people and systems can do into what they actually do.

The modern instinct: build more capacity

When performance disappoints, the instinct is understandable: close another skills gap, create another qualification, invest in another technology, improve the process, strengthen governance or add another rule. Each response may be justified. The conundrum appears when those interventions increase capacity without resolving the human and institutional conditions governing how that capacity is exercised.

Education
Knowledge
Skills
Technology
Capital
Infrastructure
Regulation
Institutions
Moral Mortar: Calibre as the cohesive human dimension connecting capacity to dependable use.

The metaphor is not an argument that Calibre can replace any of the bricks. A wall still needs sound materials. The question is whether individually strong components are being connected by sufficiently dependable judgement, responsibility, integrity and values-led agency when pressure is applied.

Capacity is potential, not outcome

CapabilityWhat a person, team or institution knows, understands or has the potential to address.
CompetencyWhat can be demonstrably applied or performed to an expected technical, professional or operational standard.
CalibreHow, why and for whose benefit Capability, Competency, discretion, responsibility and influence are exercised.

IOWL keeps the third dimension visible because a system can become more knowledgeable and technically capable while still experiencing poor judgement, misconduct, weak implementation, low trust or disappointing performance.

Accumulated capacityEducation, skill, experience, technology, capital, systems, authority, infrastructure and institutional capability.
Human and institutional conversionDecisions, priorities, incentives, interpretation, challenge, collaboration, use of discretion, accountability and conduct.
Realised outcomesPerformance, public value, productive contribution, integrity in practice, resilience, trustworthiness and social consequence.
CALIBRE - proposed as one human influence on the reliability, direction and consequence of the conversion process.

The Capacity Conundrum and the Performance Gap

The Performance Gap and the Capacity Conundrum are related but not identical. The Performance Gap is a diagnostic description of the difference between what available capacity could reasonably support and what is actually realised in a particular person, team, organisation or system. The Capacity Conundrum is the wider recurring error of assuming that building more capacity will, by itself, close that gap.

What the system could supportAvailable knowledge, skill, people, technology, capital, authority, structures and institutional resources.
CONVERSION GAPValue may be lost, delayed, distorted or never realised between capacity and outcome.
What the system actually deliversObserved performance, public outcomes, conduct, reliability, resilience, productivity and trustworthiness.
Leadership DragAvailable capacity is under-used or misdirected through weak judgement, poor accountability, low trust or leadership inconsistency.
Calibre RiskIntegrity gaps, misaligned incentives, poor consequence-awareness or misuse of discretion expose otherwise capable systems to avoidable failure.
Policy LeakageThe value intended by policy, strategy or investment is weakened between design, implementation and lived outcome.
Fragility under pressureSystems that appear capable in normal conditions fail when shocks, scrutiny, incentives or competing interests test judgement and behaviour.

These are IOWL diagnostic constructs. They should not be used to relabel every failure as a Calibre failure. Their purpose is to make recurring human conversion losses visible alongside technical, financial, structural and market explanations.

A highly capable system can still fail badly

The Capacity Conundrum became visible to IOWL through a simple contradiction: some of the most serious institutional failures occur in environments containing highly educated, technically sophisticated and professionally experienced people.

The 2008 financial crisis is an important illustration, though not a proof of the IOWL construct. The crisis had many causes, including macroeconomic conditions, incentive structures, regulatory weaknesses, governance failures, risk-management failures and institutional complexity. It did not arise because modern finance lacked intelligent or technically capable people.

Official inquiries also identified breakdowns in accountability, ethics, governance and judgement. The relevance to the Capacity Conundrum is bounded: additional capability did not automatically produce responsible use of that capability. Greater expertise and authority can increase the scale of both constructive and destructive consequence.

The more a person or institution can do, the more consequential the question becomes: what governs how that capacity is used?

Doing things right and doing the right thing

Doing things rightExecution, procedure and competence. Was the process followed correctly? Was the task completed effectively? Was the technical standard met?
Doing the right thingJudgement, purpose, responsibility and consequence. Should this course be taken? Is the literal permission consistent with the intended purpose, public interest or values that should govern the decision?

Sophisticated systems create circumstances in which those questions can separate. A professional may comply with the literal wording of a rule while frustrating its purpose. A manager may follow procedure while treating people unfairly. An organisation may technically satisfy disclosure requirements while obscuring information others need to understand the real position.

Rules, controls and competencies matter. But every external rule eventually reaches a human decision-maker. Someone interprets it, applies it, challenges it, works around it or decides whether a technically lawful option is responsible. The Capacity Conundrum therefore reaches directly into the later Working Papers on compliance, integrity and public value.

One conundrum, many policy silos

The consequences of poor conversion are normally discussed separately. That can hide the common human question running through them.

Policy or institutional domainCapacity being builtConversion questionPossible consequence when conversion is weak
EducationKnowledge, qualifications, intellectual capability and professional preparation.How are knowledge, values, judgement and agency transferred into later contexts?Qualified people whose capability does not become dependable contribution.
EmploymentSkills, experience, systems, technology and role authority.How reliably are Capability and Competency exercised in real decisions and relationships?Under-used skills, rework, weak collaboration, poor decisions or avoidable turnover.
Integrity and complianceRules, codes, governance, controls and reporting structures.How do people interpret, apply and act when rules meet ambiguity or self-interest?Compliant appearance without dependable conduct.
Government and public servicePolicy, funding, legislation, expertise and administrative capability.How reliably does policy intention survive implementation, discretion and coordination?Policy leakage, delivery failure, low trust and reduced public value.
ProductivityHuman capital, technology, investment, infrastructure and institutions.How effectively are productive inputs converted into sustained valued outputs?Persistent performance gaps and disappointing productivity outcomes.
SocietyInstitutions, knowledge, civic capability, technology and collective resources.How are influence, responsibility and power exercised across changing contexts?Fragility, mistrust, polarisation, misconduct or reduced social cooperation.

IOWL's systems proposition is that these are not wholly separate human problems. The same underlying question repeatedly appears: how, why and for whose benefit are Capability, Competency, discretion and influence exercised?

Capability can increase consequence without increasing Calibre

Knowledge and technology can increase what a person or institution is able to affect. They do not carry their own moral direction.

ExpertiseCan solve harder problems, but can also make poor decisions harder for others to detect or challenge.
AuthorityCan coordinate action at scale, but can also enlarge the consequence of poor judgement or self-interest.
TechnologyCan improve reach, speed and productivity, but can also scale bias, error, manipulation or irresponsible decisions.
CapitalCan fund innovation and productive activity, but allocation decisions can also amplify short-termism or distorted incentives.
Institutional capacityCan deliver complex public and private missions, but strong structures do not eliminate human discretion within them.
RegulationCan constrain and direct behaviour, but cannot permanently substitute for judgement, accountability and responsible interpretation.

This is why the IOWL argument is not anti-capability. It is precisely because greater capability is valuable that the quality governing its use becomes more important.

The Calibre imperative is life-course, not institution-owned

Calibre is not created by a university, employer, profession or IOWL course. It may already be strongly evident in people with extensive formal education and in people with little or none. Structured development can make existing Calibre visible, articulate it, strengthen areas that need development and provide evidence of how it is exercised.

Capacity changesKnowledge, tools, technologies, standards and professional practices can date, depreciate or be replaced.
Contexts changePeople move between life, work, teams, organisations, professions, leadership, community and wider society.
The Calibre imperative enduresThe requirement for judgement, integrity, responsibility and consequence-awareness does not become technically obsolete, although its application must change with context.
Perpetual Calibre Development: recognise > develop > transfer > evidence > reaffirm > recalibrate

PCD is therefore relevant to the Capacity Conundrum because it provides a mechanism for following the human conversion dimension after any single educational or developmental intervention has ended. It can support transfer of Calibre from one domain into another and continuing evidence as authority, pressure and consequence change.

What the IOWL architecture does about the conundrum

The Capacity Conundrum is a diagnosis, not the intervention itself. IOWL's wider architecture is designed to make the otherwise diffuse human dimension more explicit and researchable.

DefineSeparate Capability, Competency and Calibre so that judgement and values-led conduct do not disappear inside broad skills language.
RecogniseAcknowledge that Calibre may already be present and make it easier to articulate and evidence.
DevelopUse Positive Value Leadership and structured reflection where Calibre requires strengthening or transformation.
Assess and evidenceUse bounded assessment and Calibre recognition without claiming permanent moral measurement.
TransferSupport conscious movement of Calibre between personal, professional, organisational and societal domains.
ContinueUse PCD to reaffirm, challenge and recalibrate Calibre as circumstances and responsibilities change.

The empirical question remains whether this architecture improves developmental, behavioural, professional and organisational outcomes. The intervention is deliberately designed so that those claims can be tested rather than assumed.

Policy and evidence context

This working paper is designed to sit beside existing policy, economic, educational, integrity and public-service systems. It does not claim those systems have ignored human behaviour. The sources below show adjacent areas in which capacity, implementation, management, values, integrity and productive performance are already treated as relevant.

Your policy lens

A directly tailored national source register for your location has not yet been added to this edition. International comparator sources are shown below and the argument should be read alongside the relevant national policy, regulatory and institutional frameworks in your jurisdiction.

International and comparative sources

OECD Global Forum on ProductivityInternational research on productivity, human capital, technology, institutions and the conversion of inputs into output.
OECD - The Human Side of ProductivityAdjacent evidence on worker and managerial characteristics, management and firm-level productivity.
OECD Anti-Corruption and Integrity Outlook 2026Current integrity context illustrating the continuing distinction between formal frameworks and implementation in practice.
OECD Future of Education and Skills 2030/2040Knowledge and skills considered alongside attitudes, values, agency and responsibility.

Where OECD material is used, the relationship is an analytical mapping to published OECD themes and evidence. It does not imply OECD endorsement, validation or adoption of IOWL frameworks.

Full working paper

The Capacity Conundrum

The longer paper develops the systems argument, distinguishes the IOWL proposition from established evidence, and explains why capacity-building, Calibre, performance, integrity, implementation and public value need to be examined together.

IOWL Working Paper - Version 0.22 - 2 September 2026

The Capacity Conundrum

Why more education, skills, technology, regulation and institutional capacity do not automatically produce better outcomes

Principal audience: Government, education, employers, economic-development bodies, workforce planners, regulators, public services, professional bodies and institutional leaders.

1. The recurring capacity response

Modern institutions are exceptionally good at building capacity. Governments expand education and training. Employers develop skills and management systems. Organisations adopt technology, create controls and hire expertise. Public bodies strengthen governance and regulation. These interventions can be essential because a system cannot produce outcomes for which it lacks the necessary knowledge, skill, authority, technology or resources.

The Capacity Conundrum begins with a different question. What happens when the system possesses substantial capacity and still fails to convert it reliably into the intended result?

The usual response to underperformance can be to add more of the same category of input: another qualification, another training programme, another technology, another process, another regulator or another layer of control. Sometimes that is the correct response. But if the binding constraint sits in judgement, incentives, accountability, implementation, cooperation or integrity, increasing technical capacity may leave the underlying conversion problem substantially intact.

2. Capacity is potential

A qualification provides evidence that learning has taken place to a defined standard. A skill provides an ability to perform. Technology expands what can be done and the speed or scale at which it can be done. Capital provides resources. A governance structure allocates authority and defines accountability. A regulation sets boundaries and obligations.

None of these, by itself, determines how human beings will exercise what has been created. Capacity therefore describes possibility. Outcomes arise only after capacity has passed through decisions, priorities, incentives, relationships, implementation, interpretation and behaviour.

Capacity creates possibility. It does not determine direction. The Capacity Conundrum asks what governs the conversion of possibility into dependable outcome.

3. Capability, Competency and Calibre

IOWL separates three complementary human dimensions. Capability concerns what a person knows, understands and is intellectually equipped to address. Competency concerns what the person can demonstrably apply or perform to an expected standard. Calibre concerns how, why and for whose benefit Capability and Competency are exercised, particularly where judgement, discretion, responsibility, influence and consequence are present.

The distinction is important because the first two dimensions can be extremely strong while the third remains inconsistent. The framework does not imply that every failure is a Calibre failure. It creates a language for examining an aspect of human performance that can otherwise be absorbed into broad categories such as skill, leadership, culture or ethics.

4. The conundrum as a conversion problem

The Capacity Conundrum can be expressed as a systems problem: inputs expand, capacity rises, but realised outcomes do not improve proportionately. The gap may be caused by many factors. Technology may be poorly matched to process. Capital may be constrained. Institutions may be badly designed. Roles may be unclear. Market conditions may change. Measurement may be incomplete.

IOWL's narrower proposition is that human conversion factors also matter. Decisions can be delayed because responsibility is avoided. Information can be withheld because challenge is unwelcome. Incentives can reward the wrong behaviour. Capable people can remain silent when they should speak. Authority can be used for self-protection rather than purpose. Formal rules can be followed in ways that undermine their intention.

IOWL systems propositionCapacity > Human and institutional conversion > Realised outcome

Calibre does not sit as another input between skills and performance. It is proposed as one influence upon the human conversion process itself.

5. The Performance Gap is a local manifestation of the conundrum

The companion Working Paper From Performance to Productivity uses the Performance Gap to describe the difference between the performance that available capacity appears capable of supporting and the performance actually realised. The Capacity Conundrum is broader. It asks why institutions and societies can keep increasing capacity while repeatedly reproducing such gaps.

At individual and team level, the gap may appear as rework, weak collaboration, avoidance of responsibility, poor decisions or under-used expertise. At organisational level it may appear as Leadership Drag, Calibre Risk, cultural dysfunction, implementation failure or weak innovation conversion. At government level it may appear as policy leakage. At societal level it may appear as mistrust, fragility or the widening gap between sophisticated institutions and disappointing lived outcomes.

6. Leadership Drag, Calibre Risk, Policy Leakage and fragility

IOWL uses four diagnostic constructs to describe recurring forms of conversion loss.

  • Leadership Drag: available capacity is not fully used because leadership weakens challenge, accountability, trust, coordination or the conditions in which others can contribute.
  • Calibre Risk: otherwise valuable capability is exposed to integrity gaps, poor consequence-awareness, misaligned incentives, misuse of discretion or normalised unacceptable conduct.
  • Policy Leakage: intended value is lost between policy or strategy design, implementation and the real-world outcome.
  • Fragility under pressure: systems that function adequately in routine conditions fail when shocks, scrutiny or competing interests expose weaknesses in judgement and behavioural reliability.

These labels do not replace established research in organisational behaviour, economics, governance, implementation science or risk. They provide a common IOWL vocabulary for asking whether apparently different failures share a human conversion component.

7. A highly capable system can still fail

The global financial crisis provides a useful illustration because it occurred in an extraordinarily capable financial system. It should not be simplified into a Calibre story. Macroeconomic conditions, regulation, governance, incentives, risk models, institutional complexity and many other factors mattered. Yet official inquiries also identified failures of accountability, ethics, governance and judgement.

That distinction matters. A system can contain sophisticated models, experienced professionals, advanced technology and extensive regulation while still producing poor decisions. Greater capability can even increase the consequence of poor judgement because expertise, authority and scale magnify what a person or institution is able to affect.

The Capacity Conundrum therefore does not ask whether technical capability matters. It asks why technical capability is so often treated as though it were self-governing.

8. Doing things right is not always the same as doing the right thing

Competence and procedure are concerned with doing things right. They ask whether the task has been performed correctly, the process followed and the technical standard achieved. Responsible judgement adds another question: whether the chosen action is the right one in light of purpose, consequence, fairness, responsibility and legitimate interests.

In simple situations the two often coincide. In complex systems they can separate. An action can be technically compliant yet irresponsible. A reporting requirement can be met while the real picture remains obscure. A manager can follow procedure while undermining people. A professional can exploit a loophole while remaining inside the wording of a rule.

This is why the Capacity Conundrum connects directly to compliance and integrity. External systems can influence behaviour, but they cannot eliminate the continuing need for internal judgement.

9. Moral Mortar and the human-capital wall

IOWL uses the Moral Mortar metaphor to explain the relationship without diminishing the value of capacity-building. Education, knowledge, skills, health, technology, experience, capital and institutional systems are the bricks. Each can be strong and valuable. The question is what allows those separate strengths to hold together when real decisions and pressure test the structure.

Calibre is described as the cohesive human dimension connecting capacity to dependable use. The metaphor should not be interpreted as a claim that Calibre alone determines structural strength. Systems also require sound design, resources, incentives, institutions and technical competence. It makes visible the proposition that human judgement and conduct are part of what binds capacity into functioning performance.

10. Productivity, education, integrity, trust and public value are connected

One reason the Capacity Conundrum can remain hidden is that its effects are discussed in separate silos. Education asks how to develop people. Productivity asks how to convert resources into output. Integrity asks how institutions and individuals exercise power and responsibility. Compliance asks how rules are implemented. Government asks how policy becomes public outcome. Trust is often discussed after the resulting experience has already occurred.

These are distinct disciplines and should remain distinct. The systems proposition is not that they are the same problem. It is that they repeatedly encounter the same human question: how are knowledge, skill, discretion, authority and influence actually exercised?

Trust is especially important here but should not be treated as another layer of the IOWL Axiological Pyramid. Trust is an outcome or response: confidence and willingness to rely upon a person or institution. Trustworthiness is the quality demonstrated through conduct that makes such reliance more warranted. Weak conversion can therefore create not only performance loss but also evidence that reduces willingness to rely on the institution producing it.

11. Regulation cannot permanently substitute for judgement

Following failure, institutions understandably strengthen controls. Sometimes more regulation is necessary. Yet every rule eventually meets a person. Someone interprets it, decides how seriously to apply it, determines what information is relevant, identifies a loophole, decides whether to exploit it and chooses whether to challenge a breach.

The problem is not regulation. The problem is expecting external regulation to remove the need for internal judgement. A resilient system requires both. The IOWL Axiological Pyramid makes that distinction explicit by separating personal Values, socially influenced Morals, Organisational Values, professional Ethics, internal Governance and external Compliance. It describes inside-out development and increasingly outside-in systems of control without suggesting that one can simply replace the other.

12. The conundrum becomes more consequential as capacity increases

A new technology can make a competent person more productive. It can also allow a poor decision to affect more people more quickly. Greater authority can improve coordination but also increase the consequence of self-interest or poor judgement. More capital can enable innovation or amplify distorted incentives. Artificial intelligence can increase the scale of human capability while simultaneously increasing the importance of deciding what should be done, what should not be done and who bears the consequence.

The logic is therefore asymmetric. Calibre cannot compensate for missing technical knowledge where that knowledge is essential. But greater technical capability can increase the consequences of poor Calibre. The more powerful the capacity being created, the more important the quality governing its exercise becomes.

13. The life-course correction

The Capacity Conundrum is sometimes framed too narrowly around education-to-work transition. That would repeat the same mistake at a different level. Universities are one important access point to structured Calibre development, but they are not the origin, owner or endpoint of Calibre. Individuals can demonstrate significant Calibre with little formal education, and highly educated people can demonstrate poor Calibre.

IOWL therefore treats Calibre as a life-course and societal dimension. Structured development can recognise and articulate Calibre that is already present, strengthen what needs development and support its transfer between life, work, teams, organisations, professions, leadership, public service and wider society.

Perpetual Calibre Development exists because the requirement for judgement and integrity does not expire when formal education ends. Context, authority, pressure and consequence change repeatedly. PCD provides a continuing architecture through which demonstrated Calibre can be evidenced, reaffirmed, challenged, transferred and recalibrated over time.

14. The IOWL response is an architecture, not another capacity intervention

A weak response to the Capacity Conundrum would simply be to add another course and declare the problem solved. IOWL's proposition is wider. It defines a distinct Calibre dimension; provides Positive Value Leadership as a structured developmental intervention; uses assessment and bounded recognition to make development more visible; and extends the process through PCD so that recognition is not treated as a one-time event.

This distinction matters because the Capacity Conundrum is itself partly about confusing the presence of inputs with the existence of outcomes. IOWL should therefore be held to the same standard. The existence of a Calibre architecture does not prove that it has solved the conundrum. Its value is that it provides a defined intervention and evidence framework capable of being examined longitudinally and independently.

15. The research programme is already underway

IOWL's current evidence architecture includes quantitative learner measures, assessed learning, qualitative Reflective Transformation evidence and a longitudinal PCD framework intended to follow application, externally observed behaviour, professional outcomes and sustained Calibre development over time. Current evidence supports bounded claims about developmental outcomes relevant to judgement, responsibility, self-regulation, honesty, consequence-awareness, collaboration and values-led conduct.

The longer-term research task is more demanding. It must examine whether these developmental effects are sustained, whether they transfer between domains, whether others observe them, and whether they are associated with reduced conversion losses in employment, teams, organisations, public service and other settings.

16. What would count as evidence?

The Capacity Conundrum becomes more than a metaphor only if it generates testable questions. Useful evidence would need to distinguish technical, structural and contextual causes of weak outcomes from human-conversion factors.

  • Where do individuals, teams or institutions possess strong measured capacity but repeatedly realise weaker outcomes than comparable settings?
  • Which parts of the gap are explained by job design, technology, capital, market conditions, management systems or institutional structure?
  • After those factors are considered, do measures of judgement, integrity, consequence-awareness, responsibility or behavioural reliability provide additional explanatory value?
  • Can Leadership Drag, Calibre Risk or Policy Leakage be operationalised reliably enough to support comparison over time?
  • Does structured Calibre development change observed decisions or behaviour, and are changes corroborated by peers, managers, stakeholders or institutional evidence?
  • Does PCD support transfer of Calibre between contexts and sustained application as responsibility changes?

17. What can responsibly be claimed

The existence of weak outcomes in a highly educated, technologically advanced or well-regulated system does not establish a Calibre deficit. Nor does an unexplained economic residual become Calibre by default. Outcomes are multi-determined and any serious analysis must consider established economic, organisational, technical, institutional and social explanations.

The defensible proposition is narrower and more useful: capacity and outcome are not identical; human judgement and conduct are part of the conversion process; and a distinct Calibre dimension may provide additional explanatory, developmental and evidential value where existing frameworks do not make that dimension sufficiently visible.

18. Implications for policy and institutions

The practical implication is not to invest less in education, skills, technology, infrastructure, regulation or institutional capacity. It is to stop treating those investments as self-converting.

  • Education: continue building Capability and Competency while recognising that values, judgement and Calibre development do not begin or end within one institution.
  • Employers: examine whether high technical capacity is being converted into reliable contribution, challenge, collaboration, responsibility and sustained performance.
  • Government: evaluate not only policy design and funding inputs but also the human and institutional conditions through which intention becomes implementation and public value.
  • Regulators and professional bodies: retain strong external standards while recognising that rules depend upon interpretation, judgement and behaviour in practice.
  • Productivity bodies: maintain established economic determinants while remaining open to measurable human-quality factors affecting the conversion of inputs into realised performance.
  • IOWL: continue subjecting the Calibre proposition and its interventions to longitudinal and independent scrutiny rather than using the framework as its own proof.

Research questions

  • Where are the strongest empirical examples of expanding capacity coexisting with persistently weak realised outcomes?
  • Can Calibre-related measures add explanatory value beyond qualifications, skills, management and established institutional variables?
  • Are Leadership Drag, Calibre Risk and Policy Leakage distinct and reliably observable constructs?
  • Does PCD improve transfer and sustained application of Calibre across changing contexts?
  • Does stronger Calibre evidence correlate with more dependable performance, integrity in practice, policy implementation, trustworthiness or resilience?
  • At what level does the Calibre signal become too diffuse to support causal interpretation, particularly when moving from individuals and teams towards organisations, governments and national productivity?

Source trail and selected literature

Research and accuracy note: This working paper distinguishes established external literature and policy context from IOWL definitions, conceptual propositions, internal emerging evidence and questions requiring longitudinal or independent evaluation. The financial-crisis example is illustrative rather than proof of the Calibre construct. Claims should be revised as stronger evidence becomes available.

Use the paper as a basis for challenge

IOWL welcomes institutional, policy and research scrutiny of the Capacity Conundrum, the Calibre proposition and the evidence required to test it.