SEARCH FACILITY Use this to look for a term or phrase throughout The Logician site, or in a selected one of its modules:

 powered by FreeFind

 Use the form above to search for documents in this website containing specific words or phrases. Type your query and press Search button. BE SURE TO SPELL CORRECTLY (it is no use, for instance, searching for “hypothisis”)! Note that I usually prefer American to British spelling of English.This search facility seems based on whole words ; parts of words won’t do. If a noun does not work, try the corresponding adjective or verb; or vice-versa; e.g. if “Freud” yields nothing or not enough, try “Freudian”. Preferably, keep your query simple. Try single words rather than complex phrases. e.g. ask for “adduction” rather than for “the definition of adductive argument”.More often than not, you are likely to be offered too many hyperlinks in response to your query.For this reason, you may find it worthwhile searching through one book at a time, using the box on the right hand side marked ‘site’ to select the book. But note that you can also ” refine ” your search in successive stages.

Sometimes, the best way to search for a specific topic in The Logician is to look in the General Sitemap , or in the more detailed tables of Contents of the various books (use the buttons at top and on the left to find those). Once there, you can use your browser’s “edit/find” facility; or scroll down looking for the chapter and section most likely to contain the information you need. (For example, if you seek the definition of ‘logic’, it is hopeless to search for that word, since it is used in almost every page! Rather, go to Future Logic, chapter 1, section 1, and you will likely find a good first definition.) Try also the Shortcuts below to various topics. Or checkout the Google Books Search tool given further down. If after serious search you still cannot find what you are looking for, simply put your query in writing to:


 Major Innovations.Important new discoveries in logic:
Factorial Induction in FL 50-59
Future Logic is the first work ever to strictly formalize the inductive processes of generalization and particularization, through the novel methods of factorial analysis, factor selection and formula revision.
Matricial Analysis in LC 11-24
The Logic of Causation is the first work ever to strictly formalize the induction and deduction of causative and indeed all conditional propositions, by means of matricial analysis.
A Fortiori Argument in AFL 1-4
A Fortiori Logic provides a thoroughly formal analysis of various aspects of this subject which were not previously investigated in such detail in my Judaic Logic book.


People. Some Logicians and Philosophers treated:
384-322 BCE
circa 200 BCE
90-135 CE
150-250 CE
early 5th CE
Saadia Gaon 882-942
Maimonides 1135-1204
Gottfried Liebniz 1646-1716
Thomas Reid 1710-1796
Johann Goethe 1749-1832
Louis Jacobs 1920-2006
Many more authors are studied in detail in AFL part 3.

Best Of.Many otherimportant novelties, among which:
Modal syllogisms A fortiori argument
The logic of change The form of evolution
Class logic The nature of negation
The principle of induction Adduction
Volition and causation Influences on freewill
Perception and recognition Ratiocination


Popular topics. Some issues often raised in debates are treated in the following Thematic Compilations (now published as separate books):
The Laws of Thought
Inductive Logic
Paradoxes and Their Resolutions
The Self
Logic in the Torah
Logic in the Talmud
Logical Criticism of Buddhist Doctrine


All the books posted in The Logician Website are now on sale as quality hardbacks, paperbacks or eBooks in various outlets.

In the CreateSpace store, paperbacks, and in the Kindle store, the corresponding .mobi e-books. Or just go to, where there’s often a discount.

In store, hardbacks (for the six largest books), as well as paperbacks and .epub e-books.


 Click here for a selection of Links. 

For more people and topics (or for more on the same people and topics), use the search facility above.

To search through Google Books Search, use the following:

Search the full text of our books

To search the web, you can use the following: