For 10 points, identify this Greek philosophical school that cast doubt on humans' ability to gain knowledge about the world.
The brother of Julian Barnes, Jonathan Barnes, has written about this school of thought in works titled for its "toils" and "modes." A thinker associated with this school of thought described an artist flinging a sponge at a painting of a horse to illustrate the unexpected sources of "tranquility." This school of thought rejected the concept of katalepsis in favor of one based on "incomprehensibility," or acatalepsia. It's not phenomenology, but a member of this school of thought discussed the use of epoche ("eh-po-KAY") to induce ataraxia in a work that criticizes the "Academics" and the "Dogmatics." Sextus Empiricus promoted this school of philosophy in his Outlines of Pyrrhonism. For 10 points, identify this Greek philosophical school that cast doubt on humans' ability to gain knowledge about the world.
The brother of Julian Barnes, Jonathan Barnes, has written about this school of thought in works titled for its "toils" and "modes."
Skepticism [accept Pyrrhonism until read; accept Academic Skepticism] &lt;Philosophy&gt;