practition Castañeda’s term for the characteristic content of practical thinking. Each practition represents an action as something to be done, say, as intended, commanded, recommended, etc., and not as an accomplishment or prediction. Thus, unlike propositions, practitions are not truth-valued, but they can be components of valid arguments and so possess values akin to truth; e.g., the command ‘James, extinguish your cigar!’ seems legitimate given that James is smoking a cigar in a crowded bus. Acknowledging practitions is directly relevant to many other fields. See also ACTION THEORY, CASTAÑEDA, DEONTIC LOGIC , FREE WILL PROBLEM , PRACTI – CAL REASONIN. T.K.