Dietrich Eric Dietrich & Hardcastle Valerie Gray Hardcastle 
Sisyphus’s Boulder [PDF ebook] 
Consciousness and the limits of the knowable

Consciousness lies at the core of being human. Therefore, to understand ourselves, we need a theory of consciousness. In Sisyphus’s Boulder, Eric Dietrich and Valerie Hardcastle argue that we will never get such a theory because consciousness has an essential property that prevents it from ever being explained. Consequently, philosophical debates over materialism and dualism are a waste of time. Scientific explanations of consciousness fare no better. Scientists do study consciousness, and such investigations will continue to grow and advance. However, none of them will ever reveal what consciousness is. In addition, given the centrality of consciousness in philosophy, Dietrich and Hardcastle claim that philosophy itself needs to change. That the central problems of philosophy persist is actually a profound epistemic fact about humans. Philosophy, then, is a limit to what humans can understand. (Series A)