User blog comment:KidVegeta/Canonicity/@comment-3097771-20101122104523/@comment-3097771-20101122105930

Canon means it happened. Some movies did happen in the normal timeline, but some couldn't have (such as the slug move, such as the gogeta movie). All movies have some inconsistencies, even movie 5. But, it's all about severity. The ones which I've listed as non-canon are merely alternate universe, and did not take place in the normal Dragon Ball timeline. -KidVegeta