Critical Notice

Abstract

The second volume of Mr. Johnson’s great work on Logic deals with demonstrative inference, deductive and inductive. It is perhaps even more interesting than the first volume, on account of the extreme practical importance of its main subject, and also on account of the digressions on such matters as Magnitude and Symbolism. It covers the whole range of mathematical reasoning, and it also deals with those types of argument which Mill tried, not too successfully, to classify in his Inductive Methods. Incidentally it contains almost the only good criticism that has yet appeared on a number of fundamental, but rather technical, points in Russell’s Principles of Mathematics.[...]