If you have beliefs about the matter already, push the "reset" button and erase that part of your map. You must feel that you don't already know the answer.

It seems like a bad idea to intentionally blank part of your map. If you already know things, you shouldn't forget what you already know. On the other hand, if you have reason to doubt what you think you know, you should blank the suspect parts of your map when you had reason to doubt them, and not artificially as part of a procedure for generating curiosity.

I think what you may be trying to say is that it is good practice to periodically rethink what you think you know, and make sure that A) you remember how you came to believe what you believe, and B) your conclusions still make sense in light of current evidence. However, when you do this, it is important not to get into the habit of quickly returning to the same conclusions for the same reasons. If you never change your conclusions while rethinking them, that's probably a sign that you are too resistant to changing your mind.