Aporia is a noun that refers to an internal contradiction.

Our word of the day comes from the Greek word aporos (uh POOR ose) which means ‘impassable.’ Aporias are commonly seen in philosophy. Here’s an example:

When my former roommate told me that everything he said was a lie, I wondered if he was aware that his statement was an aporia. This turned out to be one of many internal contradictions I’d find in his words.