Board Thread:General Discussion/@comment-31981697-20170722123329/@comment-32182236-20171029114418

"That's speaking of the real world timeline, not the game's timeline. Don't mix those two together."

If we're trying to canonize the trailer, all the events must make sense within the canon. Also, there's Papyrus thinking he's the mom.

"I think we need a more direct confirmation from him about this."

It s true that there doesn't seem to be evidence supporting either side. (Well, there IS the paradox, but it technically only proves the game the dog made isn't their universe.) So, since each side explains things equally well, each with the same amount of canon evidence (zero), we take the simpler, more statistically likely option-It's just a normal game designer.

"If you program only a hack, albeit a big one, you can't call it a whole game, since you still need the original core game for it to work."

If you only program bits and pieces of Undertale, you can't call it a whole game, since you still need the other parts of the game for it to work.