Philosophy
The Demarcation Problem
Quick fact
Philosopher Karl Popper proposed falsifiability as the key criterion: a theory is scientific only if it can be proven false. Yet this single rule has been widely criticized as too narrow.
Why this is interesting
You’ve probably heard something called “pseudoscience,” but how do we actually tell the difference between science and something that just looks like it? That’s the demarcation problem—a philosophical puzzle that has no simple answer.