Ruminationsis now available as a paperback (400p. A5, $20 plus shipping expenses), and as an eBook ($2.50).
To order online click on the following hyperlink:

Books by Avi Sion in The Logician Bookstore



Ruminationsis a collection of sundry notes and essays on Logic. These complement and enrich the author’s past writings, further analyzing or reviewing certain issues.

Among the many topics covered are:

  • the importance of the laws of thought, and how they are applied using the logic of paradox;
  • details of formal logic, including some important new insights on the nesting, merger and splitting up of hypothetical propositions;
  • details of causal logic, including analogical reasoning from cause to cause;
  • a phenomenological analysis of negation.

Additionally, this volume is used to publish a number of notes and essays previously only posted in the Internet, including:

  • a thoroughly revised version of an essay onJ.S. Mill’s Methods;
  • various addenda and diagrams forJudaic Logic, as well as a historical essay;
  • a brief analysis of Islamic logic.