The mathematical mind-bender we all needed! Someone's asking how many sides a circle has, and the answers range from "0" to "infinite" with "1" and "2 (inside & outside)" in between.
This is actually a fascinating geometry problem that mathematicians have debated. A circle is technically a single curved line (so 1 side?), but that line contains infinite points (so infinite sides?). Or maybe it has 0 sides since it has no straight edges? Or perhaps 2 sides if you count the inside and outside boundaries?
Next time you want to see your math professor have an existential crisis, just drop this question during office hours!