Is man the measure of all things? Or at least, are creatures with subjective internal consciousness the measure of all things? In ancient Greece, the Sophists answered yes. In so doing, they inaugurated Western reflection on a perennial question that stretches throughout both theoretical and practical philosophy, epistemology and ethics.

I’ve briefly discussed this question before, with a focus on ethics. Afterwards, following James Doull, I examined how it gets works out in the history of Western philosophy after the Sophists – in ethics. But as Doull knew, there is an epistemological story that parallels the ethical. Continue reading →