The Circular Trap of Human Knowledge

How do you prove your knowledge is true without already assuming you have a way to test it? This puzzle reveals that all human certainty rests on a circular argument about how we define truth itself.

To know something, you need a criterion to test it. But to trust that criterion, you need to prove it is accurate, which requires yet another test. This leads to an endless loop where we must eventually just accept a starting point on faith. Philosophers have debated this logical trap for centuries because it shows our foundation for truth is surprisingly shaky. It is a fundamental wall we hit when trying to justify why we believe anything at all.