Biological evaluation is the process through which living systems distinguish internal and external conditions according to their significance for viability, functional integrity, and adaptive persistence.
In APS, biological evaluation is a fundamental consequence of biological agency. Living systems must continuously regulate themselves under changing conditions. To do so, they must distinguish among conditions that support persistence, conditions that threaten it, and conditions that are irrelevant. Biological evaluation provides this capacity.
Biological evaluation is not conscious judgement, moral reasoning, or reflective assessment. It occurs throughout the living world, from cellular regulation and bacterial chemotaxis to plant behaviour, animal cognition, and human deliberation. The mechanisms differ greatly across organisms, but the underlying process remains the same: conditions are distinguished according to what they mean for the continued functioning of the living system.