Speak with some conviction

That would canonize these comments. Canon opens it up to the rules of plot and continuity, and detracts from the work permanently if it fails to gel properly with the rest of the established canon.

Saying maybe allows it to be interpretation instead. Which means its "true" until someone points out how it doesn't work within the story or history, then its easily dismissed as just implied or inspiration instead of hard truth.

Its the "nose on, nose off" Jon Stewart method applied to creating works.