Philosophy
Infinite Regress Arguments in Epistemic Justification
Quick fact
The ancient Greek skeptic Agrippa (around 200 BCE) listed the infinite regress as one of his 'Five Modes' leading to the suspension of judgment.
Why this is interesting
When you say you know something, you usually need to give a reason. But what reasons back up those reasons? And what backs up those? This endless chain of 'why?' forms the core of a classic philosophical puzzle.