Philosophy
Gettier Problems and the Definition of Knowledge
Quick fact
Edmund Gettier's 1963 paper was barely three pages long, but it overturned a 2,000-year-old definition of knowledge that dates back to Plato.
Why this is interesting
You know you're supposed to know what you know, but what if your confidence is just a lucky guess? Is a true belief that you're justified in holding always knowledge?