Quote Originally Posted by DocFrance
I think it's just that the writers didn't bother to think this one through. I wouldn't put too much thought into it.
Quote Originally Posted by look_out_below
Just sit back and enjoy playing the game while trying to ignore inconsistencies and plot holes found throughout the game.
As far as I can tell, there are no plot holes or evidence of writers not thinking things through in FFX. Masamune has explained everything pretty much accurately and thoroughly, if you read his posts. He's stated several times that "dreams" in Spira terms doesn't exactly mean that they are imaginary. Obviously, Tidus can think, talk, walk and appears to be just like everyone else in Spira-- he was just manifested by the dreaming of the Fayth. Tidus isn't imaginary, Jecht isn't imaginary, and Sin isn't imaginary. "Dream," in Spira, if you're referring to the dreams of the Fayth, does not mean "imaginary."