Question

question 13 (1 point)
propositions are either
true or false.
sound or valid.
certain or likely.

Explanation:

In logic (a subfield related to Philosophy in Arts or Mathematics/Logic), a proposition is a declarative statement that has a definite truth value, meaning it must be either true or false. "Sound" and "valid" are terms for arguments, not propositions. "Certain" and "likely" deal with probability or epistemic status, not the inherent truth - value of a proposition.

Answer:

A. true or false.