Can your senses deceive you?

Can your senses deceive you?

The question of being deceived by the senses is very old – probably originating even before the Ancient Greek Skeptics, the Pyhrronists. It is indeed something that human beings must have wondered about ever since they were human beings; the experience of believing something and finding out that the belief is false is, after all, common to all of mankind. But before I begin to go in more detail, I want to make a distinction between global skepticism, and local skepticism. Global skepticism is skeptical of everything except itself – this is exactly what modern skepticism, starting with René Descartes affirmed, and more recently what the brain-in-a-vat theories claim. Local skepticism on the other hand is skeptical of knowledge claims, including even the knowledge claim that one does not know – this is similar to what Ancient skepticism was like. The Ancient skeptic Sextus Empiricus, who best documents the teachings of the Pyrrhonists in[…]

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