'Professor Putnam presents a powerful, coherent and persuasive system of thought. Ranging widely over the topics mentioned in their titles, the two volumes of essays yet have a remarkable degree of unity. Their themes overlap and are linked, as philosophical themes, seriously handled, must always overlap and be linked. In a period in which the general level of philosophical competence, as evidenced in publication, is extremely high, Putnam's work stands conspicuously out by virtue of its combination of technical sophistication, clear-sightedness, depth and power. Nothing of what he says is trivial, most of it is true and all parts of it are systematically interconnected. His prose - lucid, lively and unpretentious - is an excellent medium for his thought.' P. F. Strawson, The Times Literary Supplement
Professor Hilary Putnam's most important published work is collected here, together with several new and substantial studies, in two volumes. The first deals with the philosophy of mathematics and of science and the nature of philosophical and scientific enquiry; the second deals with the philosophy of language and mind.