he Fallacy of Modal Logic / Modal Scope Fallacy / Misconditionalization occurs when the scope (of what is necessary/possible in a statement or argument) is confused. Modal logic is everything that classical logic is except with the addition of modal operators of necessity or possiblity.
"If the Big-Bang-Billions-of-Years-No-Flood-Molecules-to-Man story is real history, then the Big-Bang-Billions-of-Years-No-Flood-Molecules-to-Man story has to be real history. Therefore, the Big-Bang-Billions-of-Years-No-Flood-Molecules-to-Man story is real history."