Polish philosophy of science has been the beneficiary of three powerful creative streams of scientific and philosophical thought. First and fore- most was the Lwow-Warsaw school of Polish analytical philosophy founded by Twardowski and continued in their several ways by Les- niewski, Lukasiewicz, and Tarski, the great mathematical and logical philosophers, by Kotarbinski, probably the most distinguished teacher, public figure, and culturally influential philosopher of the inter-war and post-war period, and by Ajdukiewicz, the linguistic philosopher who was intellectually sympathetic with the...

Polish philosophy of science has been the beneficiary of three powerful creative streams of scientific and philosophical thought. First and fore- most was the Lwow-Warsaw school of Polish analytical philosophy founded by Twardowski and continued in their several ways by Les- niewski, Lukasiewicz, and Tarski, the great mathematical and logical philosophers, by Kotarbinski, probably the most distinguished teacher, public figure, and culturally influential philosopher of the inter-war and post-war period, and by Ajdukiewicz, the linguistic philosopher who was intellectually sympathetic with the...

In this book I have tried to develop further the ideas expressed in my previous work, Between Experience and Metaphysics, which was published in the same series in 1975. Several years have passed since the original Polish edition (and then 1 the Italian translation) of this book appeared. The fact that the principal ideas expressed in it have withstood, as I see it, the brunt of criticism, has led me to remain basically with the original text. Two main changes have, however, been introduced. First, I have added an Appendix containing the original version of a paper I presented at the...