Another way to deal with the issue would be to claim that you memorized the password via a mnemonic like a memory place that’s easily destructible. If you fill up a memory place with a bunch of new items, the old memory that stores the password becomes inaccessible because of memory interference.
That sounds like an overly convoluted way of saying “I forgot”, with the added disadvantage of making the judge think you’re up to no good.
That sounds like an overly convoluted way of saying “I forgot”, with the added disadvantage of making the judge think you’re up to no good.