Kinda. The difference is that a supposition has some facts to go on, a guess is pure random. A supposition is kinda like playing pretend, more than guessing. For instance, "suppose" that you are a...
it means they would not care if someone was as mean to you as mean as they were to you. sometimes it means they do and its just that they are too insecure to tell the truth and use childish anticks...