 In 1948, the young Anscombe read a paper [CSL] to the Socratic Club attacking an argument offered by C. S. Lewis in his book Miracles. In Chapter 3 of that book Lewis argued that naturalism is self-refuting. Lewis attended her talk, and, although accounts vary, some acquaintances report that he was crushed by her withering criticism. In any case, Lewis significantly rewrote the relevant chapter in the subsequent edition of his book.