Lucas's Godelian argument against materialism

 Here. 

I had the chance to meet Lucas at a Wheaton Conference in, I think, 1989. 

Apparently, Godel reached the same conclusion in his Gibbs lecture of 1951, but it never came out until 1995. 

J. R. Lucas's treatment of The Abolition of Man

 Among students of C. S. Lewis J. R. Lucas is known as the philosopher who took Lewis's part in a re-run debate some 21 years later with Elizabeth Anscombe, and who was generally thought to have gotten the better of the discussion. 

Here is his paper on Lewis. 

J. R. Lucas on the Philosophical Climate at Oxford

 The philosophical climate in which I grew up in Oxford was one of extreme aridity. The ability not to be convinced was the most powerful part of a young Philosopher’s armory: a competent tutor could disbelieve any proposition, no matter how true it was, and the more sophisticated could not even understand the meaning of what was being asserted. In consequence, concern was concentrated on the basic questions of epistemology almost to the exclusion of other questions of larger import but less easy to argue in black and white terms. The undergraduate who wanted to write essays on the meaning of existence was told to confine himself to the logical grammar of ‘is,’ and was not even allowed to ask what truth was, or how one ought to live one’s life.

Lucas, J.R. (1976), Freedom and Grace, London: SPCK, ix. 

Lucas passed away a year ago yesterday. 

J. R. Lucas on The Abolition of Man

With some interesting material on Lewis-Anscombe as well.

A Quote from J. R. Lucas

The philosophical climate in which I grew up in Oxford was one of extreme aridity. The ability not to be convinced was the most powerful part of a young Philosopher’s armory: a competent tutor could disbelieve any proposition, no matter how true it was, and the more sophisticated could not even understand the meaning of what was being asserted. In consequence, concern was concentrated
on the basic questions of epistemology almost to the exclusion of other questions of larger import but less easy to argue in black and white terms. The undergraduate who wanted to write essays on the meaning of existence was told to confine himself to the logical grammar of ‘is,’ and was not even allowed to ask what truth was, or how one ought to live one’s life.-

J. R. Lucas