Part of the series: APS and Contemporary Theories

Introduction

This article compares APS with enactivism and explains why the two should not be identified. Enactivist approaches and APS share important concerns with embodiment, biological organisation, agency, normativity, cognition, and organism–environment relations, but they organise these concerns differently and need not address every biological explanandum in the same way.

The title Why Life Is Not Enactivism expresses this non-identity. It does not mean that enactivism is scientifically inadequate, that enactivist explanations cannot contribute to explaining living organisation, or that APS has been shown to provide a deeper or more complete explanation of life.

Within APS, Life is viability-oriented, constraint-closed organisation, and biological agency is viability-oriented organisational activity. These formulations distinguish the APS account of life from accounts organised primarily around cognition, sense-making, autonomy, embodiment, or organism–environment coupling. Whether that difference produces explanatory gain for APS, for an enactivist account, for both, or for neither must be assessed against particular explanatory targets.

The comparison follows the protocol established in Comparative Explanatory Methodology in Theoretical Biology: the approaches are compared through their explanatory targets, organising principles, conceptual architectures, characteristic strengths, and explanatory scope before conclusions about their relationship are drawn.

The Appeal of Enactivism

Enactivism is best understood not as a single uniform theory but as a family of related approaches concerned with embodiment, action, cognition, sense-making, autonomy, and the dynamic relation between organisms and their environments. Across these approaches, cognition is commonly investigated as something enacted through the activity of situated organisms rather than treated exclusively as internal computation or representation.

A central enactivist concept is sense-making: the idea that an organism’s activity establishes relations of significance with its environment. Organism and environment are therefore not treated simply as independently specified systems between which information passes. Their interaction can be constitutive of the organisation and activity being explained.

Enactivist approaches have also developed substantive accounts of autonomy, adaptivity, normativity, embodiment, social interaction, and the continuity between life and mind. These commitments make enactivism a serious biological and cognitive comparator for APS rather than merely an alternative vocabulary for organism–environment interaction.

APS shares several of these concerns. It likewise treats living systems as active rather than passive, takes organism–environment relations seriously, and rejects the idea that biological activity can always be understood by isolating internal processes from the conditions in which they occur.

These similarities do not make APS a form of enactivism, however, and their differences do not establish that either framework is explanatorily superior. The relevant question is how each organises its explanatory targets and whether those differences matter for particular biological explanations.

What Enactivist Approaches Explain

Enactivist approaches provide substantive explanatory resources for investigating embodiment, organism–environment coupling, sense-making, autonomy, adaptivity, normativity, social interaction, and the continuity between life and cognition.

Their importance is not limited to reminding biology that organisms interact with environments. Enactivist explanations can make those interactions constitutive of the phenomena under investigation and can analyse how autonomous biological organisation, embodied activity, and environmental engagement contribute to cognition and behaviour.

These explanatory achievements should not be weakened merely because enactivism and APS employ different concepts or organise their biological questions differently. Nor should the absence of APS terminology such as viability-oriented organisation, constraint closure, Biological Evaluation, or organised persistence be treated by itself as an explanatory deficiency.

APS nevertheless distinguishes its own explanatory commitments from enactivist formulations. In particular, APS defines life independently of cognition and does not identify biological agency simply with sense-making, cognition, embodiment, or organism–environment coupling.

That difference establishes a legitimate comparative question. It does not establish that APS supplies an explanation that enactivism lacks. Where both approaches address the same explanandum, their explanatory contributions must be compared rather than inferred from their respective conceptual architectures.

Different Explanatory Architectures

APS and enactivist approaches overlap in several of the phenomena they investigate, but they organise their explanatory concerns differently.

Many enactivist approaches give a prominent role to embodiment, autonomy, sense-making, adaptivity, and organism–environment relations in explaining cognition and the continuity between life and mind. Some formulations connect cognition closely with the organisation characteristic of living systems; others place greater emphasis on sensorimotor, experiential, social, or relational dimensions. Enactivism should therefore not be represented as having a single explanatory starting point.

APS approaches the comparison through its explicit account of living organisation. Life is viability-oriented, constraint-closed organisation, and biological agency is viability-oriented organisational activity. Cognition is not constitutive of life within this formulation: it requires further organisational capacities beyond biological agency.

This difference establishes neither a temporal sequence nor an explanatory hierarchy between APS and enactivism. It identifies a difference in conceptual and explanatory architecture. An enactivist explanation need not be reconstructed through APS concepts in order to count as a biological explanation, and APS does not acquire explanatory priority merely because it defines life independently of cognition.

The relevant comparative question is therefore not which framework begins at the more fundamental point, but what explanatory difference follows when the same biological phenomenon is organised through their respective concepts.

Viability, Organisation, and Biological Agency

Within APS, viability is not introduced as an alternative name for enactivist autonomy, adaptivity, or sense-making. It belongs to APS’s account of living organisation.

A living system is organised such that differences in conditions and activity matter materially to its continued functioning. APS describes this organisation as viability-oriented and constraint-closed: the system’s ongoing activity contributes to maintaining and re-establishing the conditions under which that activity can continue.

Biological agency is viability-oriented organisational activity. Agency in this sense is not restricted to behaviour, environmental interaction, regulation, cognition, intentional action, or sense-making. These may be important forms or consequences of biological activity in particular systems, but none by itself defines biological agency within APS.

Organised persistence concerns the explanatory problem of how this living organisation maintains and re-establishes continuity through change. It is therefore not a second definition of life and should not be treated as an achieved state that explains life by itself.

Enactivist concepts such as autonomy, precariousness, adaptivity, and sense-making may address closely related features of living systems. APS does not establish that viability orientation is deeper than these concepts simply by placing viability within its own account of life. Whether the formulations overlap, differ substantively, or provide different explanatory resources must be assessed in relation to particular explananda.

Sense-Making, Evaluation, and Significance

Sense-making occupies an important place in enactivist accounts of organism–environment relations. It concerns the ways in which environmental conditions acquire significance relative to the organisation and activity of an organism. Enactivist treatments connect this significance with such concepts as autonomy, adaptivity, normativity, embodiment, and situated activity.

APS uses a different conceptual architecture. Biological Evaluation is the process through which agency generates significance. Biological significance is therefore relationally real within APS: differences matter in relation to the viability-oriented organisation of the living system.

These formulations should not be treated as translations of enactivist sense-making into APS terminology. Sense-making and Biological Evaluation arise within different theoretical architectures, and similarity in the phenomena they address does not establish conceptual identity.

Nor does APS’s formulation demonstrate that evaluation provides the biological foundation that sense-making lacks. Such a claim would amount to an explanatory dependency requiring specification and assessment. Its truth cannot be inferred from the fact that APS distinguishes viability, agency, evaluation, and significance conceptually.

The comparison may nevertheless be informative. Both approaches investigate how differences become consequential for living systems without reducing biological significance to externally assigned value. Their accounts may overlap, diverge, complement one another, or compete in particular explanatory contexts. Determining which relation holds requires target-matched comparison.

Significance Is Not Yet Meaning

APS distinguishes biological significance from meaning. Significance is a relationally real product of biological evaluation: a difference acquires significance insofar as it bears upon the viability-oriented organisation of a living system.

This does not require every biologically significant difference to constitute meaning, representation, cognition, or conscious experience. Those concepts require their own explanatory conditions and should not be collapsed into the evaluative relation itself.

Enactivist discussions of sense-making sometimes employ a broader vocabulary of meaning or meaningful engagement. The difference should be preserved rather than resolved by stipulation. APS need not translate all sense-making into its own account of significance, and enactivist terminology need not be judged deficient because it partitions the conceptual field differently.

Whether these distinctions yield explanatory clarification or substantive biological explanatory gain is a further comparative question.

Biological Agency and Cognition

APS distinguishes biological agency from cognition. Life does not require cognition, although cognition presupposes living organisation within the biological domain addressed by APS.

The distinction is not based simply on whether a system responds to its environment, regulates its activity, processes information, predicts conditions, or exhibits adaptive behaviour. Such capacities can occur in forms that do not by themselves establish the organisational requirements APS associates with cognition.

Within APS, biological agency becomes cognitive when integrated biological significance modulates activity across a temporal field of viability-relevant possibilities in ways not exhausted by immediate or fixed regulation.

This formulation introduces counterfactual and temporal depth into the APS account of cognition while preserving biological agency as the more general category of viability-oriented organisational activity.

The distinction creates a point of comparison with enactivist approaches that connect cognition closely with sense-making, embodiment, autonomy, or life–mind continuity. It does not establish that those approaches overextend cognition or that APS has identified the uniquely correct boundary. The explanatory usefulness of the respective boundaries must be assessed against the phenomena they are intended to distinguish.

Normativity and Viability

Both APS and enactivist approaches assign an important role to biological normativity, but their formulations should not be treated as interchangeable.

Within APS, biological normativity is viability-relative asymmetry. Conditions, processes, and outcomes differ materially in how they bear upon the maintenance or re-establishment of viable organisation. Some support continued functioning; others impair, threaten, or disrupt it.

This normativity does not require conscious judgement, explicit representation, moral evaluation, or externally imposed standards. It is endogenous to the organisation of living systems.

Enactivist accounts may relate normativity to autonomy, precariousness, adaptivity, sense-making, or organism–environment engagement. Those formulations deserve to be considered on their own terms rather than redescribed automatically as instances of APS viability-relative asymmetry.

The existence of conceptual overlap therefore establishes a comparative problem, not a predetermined relation of grounding or incorporation. Whether the accounts identify the same biological dependency, different aspects of a shared phenomenon, or genuinely different explanatory targets remains open to assessment.

The Relationship Between APS and Enactivism

APS and enactivist approaches occupy overlapping explanatory territory without being identical frameworks. Both take seriously the activity of living systems, organism–environment relations, biological normativity, and forms of organisation that cannot be understood simply by treating organisms as passive recipients of environmental inputs.

Their conceptual architectures nevertheless differ. APS defines life as viability-oriented, constraint-closed organisation and biological agency as viability-oriented organisational activity. It distinguishes biological agency from cognition and gives Biological Evaluation and biological significance specific roles within that distinction. Enactivist approaches characteristically organise related questions through concepts such as autonomy, embodiment, adaptivity, sense-making, and organism–environment engagement, while differing among themselves in how cognition and the continuity between life and mind are understood.

These differences justify treating APS and enactivism as non-identical approaches. They do not justify placing one inside the other. APS should therefore not be described as incorporating enactivism, supplying the foundation that enactivism lacks, or repositioning enactivism as a subordinate theory of cognition. Conversely, conceptual overlap does not make APS simply a reformulation of enactivism.

The relationship between the approaches may vary with the explanatory target. In some contexts their explanations may overlap or prove complementary; in others they may remain independent, emphasise different dependencies, enter into tension, or support different conclusions. Particular comparisons may favour an enactivist explanation, an APS explanation, a qualified combination, or neither.

This leaves a genuine comparative question rather than a predetermined hierarchy. Where APS and enactivism address the same biological explanandum, explanatory gain must be demonstrated through target-matched comparison rather than inferred from conceptual breadth, biological specificity, terminology, or explanatory architecture.

Conclusion

Enactivism has made important contributions to understanding cognition as embodied, active, situated, and dynamically related to organism–environment interaction. Its treatments of autonomy, adaptivity, sense-making, normativity, and the continuity between life and mind also make it directly relevant to questions about biological organisation.

APS shares several of these concerns but organises them differently. It defines life as viability-oriented, constraint-closed organisation and biological agency as viability-oriented organisational activity. Within this architecture, biological agency and cognition are distinguished, Biological Evaluation concerns the generation of biological significance, and organised persistence concerns how living organisation maintains and re-establishes continuity through change.

These differences explain why APS should not be identified with enactivism. They do not establish that enactivism cannot explain living organisation, that APS provides the missing foundation of enactivist explanation, or that APS is the more comprehensive or fundamental framework.

The appropriate conclusion is therefore bounded. APS and enactivism offer distinguishable ways of organising partially overlapping biological and cognitive questions. Establishing whether either provides explanatory gain for a particular phenomenon requires comparison of what each explains, the dependencies each identifies, the evidence supporting those dependencies, and the alternatives against which the explanation is assessed.

Life is not identified with enactivism within APS. But non-identity is not explanatory superiority.

Key Point: APS and enactivism overlap in their concern with biological organisation, agency, normativity, cognition, and organism–environment relations, but organise these concerns differently. APS does not identify life with enactivism, yet this non-identity does not establish that APS explains living organisation better. Comparative explanatory gain requires target-matched assessment.

Explanatory Architecture

Central Question

How does the APS account of life as viability-oriented, constraint-closed organisation differ from enactivist approaches to biological organisation, cognition, sense-making, autonomy, and organism–environment relations, and what comparative significance follows from those differences?

Architectural Role

This clarification article establishes a non-identity claim: APS and enactivism occupy overlapping explanatory territory but organise that territory through different conceptual architectures. It does not establish that APS grounds, incorporates, completes, or supersedes enactivist explanation. Where the approaches address the same explanatory target, comparative adequacy requires target-matched assessment.

Preceding Explanatory Dependencies

These identify relations within the APS corpus rather than established biological or comparative dependencies:

  • What Is APS?
  • APS and Contemporary Theories
  • Biological Agency
  • Biological Evaluation
  • Biological Significance
  • Organised Persistence
  • Cognition — Where Does It Belong in Biology?
  • Explanatory Priority Is Not Ontological Priority

Subsequent Explanatory Developments

  • Why Life Is Not Active Inference
  • Why Life Is Not Information Processing
  • Why Life Is Not a Machine
  • Comparative Explanatory Methodology in Theoretical Biology
  • How should enactivist sense-making be compared with Biological Evaluation and biological significance?
  • How do autonomy, adaptivity, precariousness, and viability orientation relate when they address matched biological phenomena?
  • Where should the boundary between biological agency and cognition be drawn?
  • Which proposed relations among viability, evaluation, significance, sense-making, and cognition are Dependency Hypotheses requiring assessment?
  • When does enactivist explanation provide explanatory gain over APS, or APS over enactivist alternatives?

Position Within APS

This article belongs to the APS comparative clarification series. Its role is to distinguish APS from enactivist approaches without reducing enactivism to embodiment or cognition, translating enactivist concepts automatically into APS terminology, or subordinating enactivism to APS. Comparative explanatory superiority remains open.