You could still be brought before a jury to determine if you knowingly provided the wrong PIN (and thus knowingly gave false testimony) or not. Records of you intentionally setting two very similar PINs and discussing any such plan could be used to convince a jury that it was malicious.

>"write the pin on a piece of paper"

>"ok are you sure that's your pin?"

>they exit the room and come back 5 min later

>"that pin didn't work, can you write it again?"

You're going to have a hard time convincing the judge that you "accidentally" gave the wrong pin in this case.

yes, and it would be up to the jury/court to judge if you made a mistake or if you intended to give the wipe pin. Not different from you shooting someone saying you thought the gun was a fake gun. They will evaluate and decide if they believe you are lying or telling the truth.