Summary This survey deals with five books: Ethical Questions, by Moritz Schlick; Significance, Genuineness, and Love, by Paul Feldkeller; Neo-Kantian Tasks, by Kurt Sternberg; Kant's Ethics, by Arthur Liebert; and Contemporary Philosophy of the History of Art, by Walter Passarge.

Karl Popper's aim in Logik der Forschung is to consider the method of investigation used by the empirical sciences. Many people would say that their procedure is marked by the use of induction, and accordingly that the logic of scientific investigation is the logical analysis of induction. But Popper disagrees. Scientific procedure consists of two steps, an hypothesis is formed, and then it is tested. Logic is only concerned with questions of validity, and thus is only concerned with the second (...) of these steps. But every method of testing validity is deductive, and thus the logic of scientific investigation is the study of deduction as used by the empirical sciences. (shrink)

Summary This survey first deals with German Philosophy in the Twentieth Century and Forms of Thought, both by Hans Leisegang. It then summarizes Theodor Ziehen's Foundations of the Philosophy of Religion. Next it refers to a revised edition of Hermann Cohen's Religion of Reason, and to two small books by Louis Anderson. Finally some shorter announcements of other new books, including Hans Reichenbach's Philosophy of the Space-Time Theory, which Einstein has praised, Nicolai Hartmann's Hegel, and a new edition of Bolzano's (...) Theory of Science. (shrink)

Summary This survey deals with Contemporary [German] Philosophy, vol. vii, by several contributors ; The Machine-Theory of Life, by Julius Schultz ; Bernard Bolzano, by Heinrich Fels ; The Theory of Classes, by Adolf Fraenkel ; Anof Logistic, by Rudolf Carnap.

In his introduction to the logic of morals Karl Menger maintains that only two kinds of ethical inquiry are fruitful—the psychology or biology of morals and the logic of morals. The first of these is an empirical science which discovers what value judgments have actually been made and correlates them with various other factors. In this way it provides material for the logic of morals, which neither discovers empirical facts nor analyses them, but simply points out logical relations. In this (...) book Menger discusses the nature of ethical judgments and carries out some investigations of the logical type. (shrink)