The physicist works with imaginary numbers (√-1 = i), the chemist works with chemical elements (√-23 and Ir-77, which don't actually exist), and together they "prove" that 23=77. Meanwhile, the mathematician is having an existential crisis because this mathematical atrocity violates everything sacred in their universe. This is basically what happens when experimental sciences try to do math without adult supervision. Pure mathematicians spend years developing rigorous proofs, and then physicists and chemists just waltz in with their "close enough" approximations and wonder why mathematicians develop eye twitches.