Instrumental Rationality
Updated 2026-09-10
INTRODUCTION
English translation pending.
CORE DEFINITION
A person displays instrumental rationality to the extent that she takes appropriate means to her ends. On any standard it is an important and indispensable part of practical rationality; the more controversial claim is that it is not merely a part but the special or even the whole of practical rationality. Kant contrasted it with the categorical imperative by formulating it as a hypothetical imperative.
SCAFFOLDING EFFECT
Reduce cognitive load
- Means calibration: when an end is set but the necessary means are not taken, let the mismatch force a revision of the means, the belief, or the end. - End neutrality: evaluate the efficiency of an action independently of judging whether the end itself is right or wrong.
Anchor fast decisions
The normative form of instrumental rationality is usually stated as a requirement of transitivity: if you have end E and believe M is a necessary means to E, then rationality requires you to take M, or abandon E, or revise your belief. Its binding force arises from the coherence relation between intention and belief, not from the rightness or wrongness of the end.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- plato.stanford.eduhttps://plato.stanford.edu/entries/rationality-instrumental/verified
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