Oxford dictionary defines declarative sentence as : "A statement in the form of a declaration."
and Proposition as: "A statement or assertion that expresses a judgement or opinion". What is the difference between declaring something or passing a judgement or an opinion?
Because when you declare something to be 'true' or 'false' it is like passing a judgement or an opinion. So, does that mean: All declarative sentences are propositions and Vice Versa?
If so, then why we have separate words declarative and proposition. My question is closely related to "logic", but I think, if I understand the basic difference between the words declarative and proposition, then I will have some good idea about technical grammar related to logic.