Men of science are sometimes mistrustful of or at least impatient with philosophy. One of them, himself no stranger to hard thought, was one day heard to comment on his colleagues in another faculty and on their propensity to indulge in what he called "all this nonsense about thinking." Against this may perhaps be set a meeting of philosophers who decided to discuss the Second Law of Thermodynamics. When asked sardonically by a scientist whether they had disproved it, one of the philosophers replied: "No, we have concluded that it is not so much false as meaning less" . This curious...