4.032 Only insofar as it is logically articulated is a proposition a picture of a state of things.

(Even the proposition “ambulo” is composite, because its stem with another ending, or its ending with another stem, gives another sense.)

A proposition must be composite then in order to be a proposition, a picture of a state of affairs, rather than a mere word or name. Apparently simple propositions are really complex, such as the Latin “ambulo” (I walk).