Interesting article by David Barash, an evolutionary biologist and professor of psychology at the University of Washington. Hard problem in the following paragraph refers to consciousness:
I write this as an utter and absolute, dyed-in-the-wool, scientifically oriented, hard-headed, empirically insistent, atheistically committed materialist, altogether certain that matter and energy rule the world, not mystical abracadabra. But I still can’t get any purchase on this “hard problem,” the very label being a notable understatement.
Cogito ergo sum may well be the most famous phrase in Western thought, yet I am convinced that Descartes’ renowned dualism is nonsense, that mind arises from nothing more nor less than the actions of the brain. I am also nearly as confident that some day, we’ll understand how. But in the meanwhile, I can’t help appreciating Ambrose Bierce’s reformulation: cogito cogito ergo cogito sum—“I think I think therefore I think I am,” which Bierce noted might actually be as close to truth as philosophers, at least, have ever gotten.
He should try out the image on the Shroud of Turin. Full article: The Hardest Problem in Science? – Brainstorm – The Chronicle of Higher Education