The philosophy of Karl Popper (1902–94) has gained a range of interest and reaction far wider than that normally received by professional philosophers; in recent times only Bertrand Russell (1872–1970) obtained comparable (probably still greater) attention. Convinced that philosophical problems and issues came from outside philosophy itself, especially science, Popper addressed a broad audience. However, he also entered the professionals’ field, and indeed attacked some major epistemological tenets held there, such as the assumption that knowledge was accreted by the inductive (...) accumulation and classification of facts. The response to Popper’s work has created interest in his life, which was known as falling in three periods: birth and early career in Vienna, followed by nearly a decade in New Zealand, and finally a rather reclusive lifestyle in Britain after the Second World War. This book, devoted to the first two periods, is the outcome of a long research effort by the author started well before Popper’s death and incorporating a doctorate received in 1993. His book shows the incompleteness of Popper’s autobiography of 1974, which hitherto has been our main source. (shrink)

Charles S. Peirce frequently mentioned reading Richard Whately's Elements of Logic when he was 12 years old. Throughout his life, Peirce emphasized the importance of that experience. This valorization of Whately is puzzling at first. Early in his career Peirce rejected Whately's central logical doctrines. What valuable insight concerning logic was robust enough to survive these specific rejections? Peirce recommended a biographical approach to understanding his philosophy. This essay follows that suggestion by considering Peirce's reading of Whately in a larger (...) life context. Surprisingly many factors in Charles Peirce's personal and intellectual development were at play when he read Whately. His father, Benjamin Peirce, oversaw rigorous home schooling intended to train young Charley for a brilliant intellectual career. Laboratory experience with qualitative chemical analysis exposed the boy to the logic of scientific investigation, specifically to the hypothetico-deductive method of inquiry. However, tensions between father and son developed over Charles' wish to devote his life to studying the logic of science. The two also disagreed upon the value of formal science. Against this background we will review relevant logical doctrines of Whately's book, as well as his innovative formalizing practice of logical inquiry. Then we will see that it was Whately's lessons about formal science that were of such importance to Peirce. (shrink)

Symbolic logics tend to be too mathematical for the philosophers and too philosophical for the mathematicians; and their history is too historical for most mathematicians, philosophers and logicians. This paper reflects upon these professional demarcations as they have developed during the century.