Experimental Reason and Propositions

To propose X is to wonder 'What if X?'  Thus, a proposition, like a proposal, has the interrogative and hypothetical connotations expressive of Experimental Reason, as has been previously discussed here.  However, Dewey, notably, aside, most contemporary Logicians treat 'propositions' as given as declarative.  Their Logics, thus, either abstract from the Experimental Reason that supplies them with their contents, i. e. from the original propositions from which declarative statements are derived, or else are inappropriately classified as 'Propositional'.  Similarly, any use of the term 'proposition' as equivalent to 'non-linguistic state-of-affairs' is problematic, at best.