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The Collaborative International Dictionary
Propositional

Propositional \Prop`o*si"tion*al\, a. Pertaining to, or in the nature of, a proposition; considered as a proposition; as, a propositional sense.
--I. Watts.

Wiktionary
propositional

a. Relating to, or limited to, propositions.

WordNet
Wikipedia

Usage examples of "propositional".

Capital operates through just such an axiomatic of propositional functions.

And, indeed, this volume is vision-logic used in its objectifying mode, presenting a propositional map of the various quadrants and domains.

Inoshiro opened vis mouth and spewed out some random tags of propositional calculus.

This is what I meant when I said that structural-functionalism collapses propositional truth and intersubjective understanding to interobjective fit or functional fit, and ironically dissolves its own truth status into monological mesh.

In other words, behaviorism, like all Right-Hand paths, is fundamentally concerned with propositional truth.

The only twentieth-century language in which Three-phasings name makes sense is propositional calculus.