Computer Whiz (Fallout 3)

Computer Whiz is a Fallout 3 Perk.
 * Requirements: Level 18, Intelligence 7, Science 70%
 * Ranks: 1
 * Benefit: Fail a hack attempt and get locked out of a computer? Not if you’re a Computer Whiz! With this perk, you can attempt to re-hack any computer you were previously locked out of.

Commentary
You could, of course, quick save before hacking and quick load if you fail.

Even more easily, you could power the terminal off before using up your last attempt, then try again.

I've found this a useless skill. Just make sure you don't use your last attempt and refill your attempts with the ,[].{}, and <> entries. →These entries also remove duds, but there is always an entry that refills your attempts, I have found there is a tendency for it to be a part of a longer remove dud entry.