More people should read Sextus Empiricus as he's basically the O.G. Phyrronist skeptic and goes pretty hard on this very train of thought.

If I remember my Gellius, it was the Academic Skeptics who claimed that the only certainty was uncertainty; the Pyrrhonists, in opposition, denied that one could be certain about the certainty of uncertainty.

Cool. Any specific recs or places to start with him?