Finally! Sam Harris Responds to the Moral Landscape Challenge

A few months back Sam issued a challenge for someone to prove him wrong. Ryan Born rose to the challenge, as his essay was chosen out of hundreds of responses by Russell Blackford. Here is Ryan's essay. Read it and then read Sam's response Just a brief comment. I thought Sam's response is an effective one. The most interesting and controversial claim Sam makes is this one:
I am, in essence, defending the unity of knowledge—the idea that the boundaries between disciplines are mere conventions and that we inhabit a single epistemic sphere in which to form true beliefs about the world.