APS Box — Function Is Contribution to Viability

In APS, a biological function is a contribution to the viability and organised persistence of a system.

Functions are not merely selected effects, observer attributions, or mechanistic outputs considered in isolation. A process counts as functional because it helps sustain the conditions under which the organism continues to exist.

Function therefore depends on organisational context.

The same mechanism may contribute to viability in one context while undermining it in another. Functional significance emerges from the role a process plays within continuity-preserving organisation.

APS thus interprets biological function as viability-relative contribution within organised persistence.