The 'Most Important and Fundamental' Distinction in Logic

Richard B. Angell


Personal reflections on the philosophical career of Henry Johnstone, B.S. Haverford College, 1942, and Ph.D. Harvard, 1950, professor at Williams College 1948-1952 and Pennsylvania State University, 1952 - 2000. Founder and editor of Philosophy and Rhetoric, Johnstone wrote eight books, including two logic texts, three monographs, and over 150 articles or reviews. The focus is on his efforts to resolve problems stemming from the conflict between the logical empiricism Johnstone embraced in his dissertation, and the arguments of his absolute idealist colleagues at Williams, efforts he pursued in Philosophy and Argument (1959), and Validity and Rhetoric in Philosophical Argument (1978).


Henry Johnstone, Jr., Harvard University, validity, rhetoric, logical positivism, philosophical argument, argumentum ad hominem, persuasion.

Full Text:



ISSN: 0824-2577