For example, the original revision of the question Is there an idiomatic way to say "go to the path of no way out"? only asked for "the only way to get out is to go backward". After receiving some answers, I realized that I should emphasize that it's not just going backward, but also have to destroy what have been done. And after a day I continue to realize that I want to emphasize that not only one have to destroy it, but worse that they don't know that it is the only way, so basically without outside help they will keep going. I realize that adding this bit will basically disqualify all of the current answers.
So ironic. What should I do? Does this change the question enough to ask a new one? But should two similar questions be asked? In my point of view it is just a small addition from the original question. Or should I make my own answer and explain why I choose this?