How did Cloud thought that he was Zack?

[Madoka]

Had he really been pretending to be Zack until the lie actually became true to himself? It's kind of wierd.

 

[Serah]

Refer to this thread for information, particularly this post: http://www.finalfantasyforums.net/final-fantasy-vii/im-confused-about-cloud-14498.html#post236327
Next time, please browse through the forums first and search for info instead of creating a whole new thread. Thanks!
*closed*