Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

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?