Original writings by Avi Sion on the theory and practice of inductive and deductive LOGIC  

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A FORTIORI LOGIC

© Avi Sion, 2013. All rights reserved.

 

PART  II  - ANCIENT AND MEDIEVAL HISTORY

The second part of the work, Ancient and Medieval History, looks into use and discussion of a fortiori argument in Greece and Rome, in the Talmud, among post-Talmudic rabbis, and in Christian, Moslem, Chinese and Indian sources. Aristotle’s approach to a fortiori argument is described and evaluated. There is a thorough analysis of the Mishnaic qal vachomer argument, and a reassessment of the dayo principle relating to it, as well as of the Gemara’s later take on these topics. The valuable contribution, much later, by Moshe Chaim Luzzatto is duly acknowledged. Lists are drawn up of the use of a fortiori argument in the Jewish Bible, the Mishna, the works of Plato and Aristotle, the Christian Bible and the Koran; and the specific moods used are identified. Moreover, there is a pilot study of the use of a fortiori argument in the Gemara, with reference to Rodkinson’s partial edition of the Babylonian Talmud, setting detailed methodological guidelines for a fuller study. There is also a novel, detailed study of logic in general in the Torah.

 

6.            A fortiori in Greece and Rome

7.            A fortiori in the Talmud

8.            In the Talmud, continued

9.            Post-Talmudic rabbis

10.          A fortiori in the Christian Bible

11.          Islamic ‘logic’

12.          A fortiori in China and India

 

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