mnemonic

A woman with gray hair, round glasses, and a teal blazer holds a pointer like a teacher. She says, "Now, there's an easy trick to remember this: 'apple.' The 'A' is for 'accretion disk.'" A large letter "A" is drawn on the board beside her. Caption below: "Mnemonics are much easier when you're talking about the early solar system." The joke: a normal mnemonic uses a familiar word to recall something obscure, but here the obscure astronomy term (accretion disk) is being used to recall the everyday word "apple," backwards from how mnemonics usually work. Votey: a simply-drawn person says, "It also works in reverse if you need to remember what those crunchy red fruits are called" — confirming the inverted mnemonic, where you'd remember the fruit by recalling "accretion disk."