THEORY-628: Self-production alone gives a system only an all-or-nothing norm, to go on or to die, and that distinction is available to an observer, not to the system; a graded norm the system itself has, by which viable states are better or worse for it, needs adaptivity, a further capacity to detect tendencies toward the boundary of its viability and to act so as to reverse them, and sense-making and agency need adaptivity

Source

Ezequiel A. Di Paolo (2005), “Autopoiesis, Adaptivity, Teleology, Agency”, Phenomenology and the Cognitive Sciences 4(4), 429–452, LIT-1017, read in full in NOTE-719.

What was actually shown

Conservation, not homeostasis. Autopoiesis, “a concept allowing no degrees, can only entail the more general case of conservation (thus admitting the possibility of fortuitous self-maintenance)”. Its only norm is that “organisms live as long as they don’t die”. That lets an observer tell lethal from non-lethal encounters, Weber and Varela’s step A, but not the system, which their step B needs.

Two cases. “Balancing at the edge of a cliff is a perfectly viable behaviour, so is falling over the edge – both are interactions that conserve autopoiesis.” A bacterium whose nutrient intake is below its consumption, “leading to certain loss of autopoiesis in the near future”, will not “seek higher concentrations just because [it is] autopoietic”.

The definition. Adaptivity is “a system’s capacity, in some circumstances, to regulate its states and its relation to the environment with the result that, if the states are sufficiently close to the boundary of viability, 1. Tendencies are distinguished and acted upon depending on whether the states will approach or recede from the boundary and, as a consequence, 2. Tendencies of the first kind are moved closer to or transformed into tendencies of the second”. It is “not a direct consequence of the definition of autopoiesis”. Adaptivity without self-production is cybernetics, whose purpose is “external to it”.

What adaptivity gives. “An inner norm, a distinction between good, neutral, and bad ways of realizing autopoiesis”, without any optimum. It is graded, and recursive: regulation can be regulated, and “plastically adjusted or transformed depending on their effectiveness”. Pathology becomes definable as exhaustion, malfunction or conflict of adaptive mechanisms in a system that is still autopoietic, and a cure may “re-define rather than simply restore” the organism’s norms.

Agency. Behaviour is the regulation of structural coupling, not the coupling. An agent is “a self-constructed unity that engages the world by actively regulating its exchanges with it for adaptive purposes that are meant to serve its continued viability”. Agency comes in degrees and is not implied by autopoiesis and adaptivity together (note 8).

What could have come out otherwise. If the original definition of autopoiesis already implied active compensation, the gap would not exist. Di Paolo’s reading of the primary texts says it does not; he grants (note 1) that later formulations may contain adaptivity and asks that it then be made explicit.

What this does not say

• That the organism, or anything, ought to persist. The norm is for the system. Viability alone yields only “the rather useless a posteriori realization by the external observer”. NOTE-719 reads this as a stronger version of CLAIM-075’s disclaimer, not a rival to it.
• That plasticity can fail separately from regulation. Di Paolo treats the layers of adaptivity as aspects of one graded property; CLAIM-025’s thesis is that they come apart, and this paper does not show it.
• What the viability set is. It is “finite measure, bounded, and possibly time-varying”, fixed by the organisation and current state. Whether it is a constraint set or a viability kernel is not said (NOTE-719 against THEORY-134).
• That non-metabolic forms generate their own values. The last section’s habits, goggles and addiction are declared speculative.
• That adaptivity is time-asymmetric beyond a thought experiment.

Connections

• Rival: Weber and Varela (THEORY-666, from LIT-1018). They take self-production to give a point of view, valence and a world at once. Di Paolo grants their intrinsic teleology and denies that autopoiesis alone yields sense-making. Both cannot be right about what self-production suffices for, and neither paper settles it.
• Minimal agency (THEORY-071, from LIT-566). Barandiaran, Di Paolo and Rohde formalise this paper’s definition: adaptive regulation of coupling is their asymmetry condition, and agency comes in degrees.
• Malfunction from viability (THEORY-217, from LIT-1026). Barandiaran’s normative field gives the precarious region a measure, where this paper speaks of tendencies and an “outward velocity”.
• Function from self-maintenance (THEORY-220, from LIT-1029). Bickhard gives a candle flame functions; Di Paolo’s norm requires regulation, which a flame lacks.
• Viability (THEORY-134). The bacterium on its way to starving is inside the tolerated set with no viable future, CLAIM-079’s case; the mapping is NOTE-719’s.
• QUESTION-087 asks whether a self-reproducing structure can be pathological by a standard grounded in its own organisation. For organisms this account says yes: failure of adaptivity while self-production goes on. It gives no criterion for an authority structure, so it answers in part.
• CLAIM-288 grounds its demand that norms be set by the organisation itself partly in this paper’s argument, and CLAIM-339 cites it as the enactive account of norms. Both cite it as stated, through THEORY-1166.

Note of 2026-10-29: what holds it back

No worked case sets a merely self-producing system beside an adaptive one with the viability set and state space stated formally. The paper argues from the bacterium and the cliff, which the promote_when rules out, and its rival THEORY-666, that self-production suffices for sense-making, is open.