Think about it: the answer to the question “Is it opposite day?” will always be no. So how do you figure out if it is, in fact, opposite day?
Brains On! Science podcast for kids‘Is it opposite day?’ and other mind-bending paradoxesBrains-On-Science-podcast-for-kids-Is-it-opposite-day-and-other-mind-bending-paradoxeskey_live_lptrw06RFF8SZac9b3YjUhilAylVKviZ