Questions

A proposition that can be true.

For example, lions live in Africa.

A proposition that can be true or false.

For example, I'll go shopping because I'm not sure if I'm going or not.

An utterance that can be grammatically incorrect.

For example, "not much"

A sentence/an utterance that can include 3 propositions.

For example, I don't know so could you please help me and check my answers?