Just see these two questions:
A same user asked two questions with the same title.
Title of both questions (before the revision):
- How to retrieve yahoo contact in Android?
- How to retrieve yahoo contact in Android ?
(only difference is that space between Android and ?).
A user tried to improve the post (only body and not title) but he got this error message:
If someone get this error while editing a question then how can a user ask a question with the same title? (In other words if space difference is not considered while editing then why it is considered while asking?)