If you "admit" you don't know then you by definition aren't convinced by the argument and thus not falling into the trap. But it doesn't help you make decisions

If you "admit" you don't know then you by definition aren't convinced by the argument and thus not falling into the trap. But it doesn't help you make decisions any easier for stuff that is relevant to you and therefore requires you to make a decision. In that case you are going to have take a leap of faith so to speak. And choosing the way you leap might be better informed by consensus by experts in the field rather than speculative investigations on the fringe. You might still be wrong but your chances are probably improved in the correct direction most of the time.