I remember that one legal case where a man was proven to not have commited assault and rape due to a receipt putting him a few miles away, buying a bagel.

So how about you hang on to that donut receipt? You know, just in case?

What if donut-discriminating bagel-supremacists take over the world and destroy all donuts and evidence of donuts, kidnap you and torture you, trying to erase all memories of the existence of donuts from your mind and when you're finally freed, you look in your coat pocket and see this receipt, the only link you have to the truth and become a freedom fighter who takes down the totaligrarian government?