Yeah. The dude that came up with the term cognitive dissonance described this process in his book When Prophesy Fails. Basically when you are in a cult and your doomsday ends up being a normal day you have a freak out of cognitive dissonance. This isn’t great because people don’t like having their strongly held beliefs shown to be invalid. So they must come up with a post hoc rationalization as to why their doomsday didn’t come true and why they are still right.