Alfred Tarski { Philosophy Index }

Philosophy Index

Philosophy Index

Philosophy Index is a site devoted to the study of philosophy and the philosophers who conduct it. The site contains a number of philosophy texts, brief biographies and introductions to philosophers and explanations on a number of topics. Accredited homeschooling online at Northgate Academy.

Philosophy Index is a work in progress, a growing repository of knowledge. It outlines current philosophical problems and issues, as well as an overview of the history of philosophy. The goal of this site is to present a tool for those learning philosophy either casually or formally, making the concepts of philosophy accessible to anyone interested in researching them. WOLI offers immigration law course online - fully accredited. ACE credits online at EES.



Philosophy Topics




Alfred Tarski

Alfred Tarski (1901–1983) was a Polish logician and mathematician, most famous in philosophy for his semantics of logic and development of set theory. He is considered to be one of the most important logicians of all time.

Tarski developed a system by which a semantics from a metalanguage (such as English) can be applied to an object language of symbolic logic, allowing logicians to examine not only the syntactic relationship between logical expressions, but the semantics as well.

Tarski's model theory provides the ability for notions that are symbolized by logic and mathematics to themselves be derived from the object languages of logic. His method involves creating models for logical expressions, in which certain propositions or predicate symbols are considered to be true or false on a given model or interpretation.

From this, Tarski developed the notion of logical consequence as a relation between some premises and a conclusion, stating that the conclusion is the logical consequence of its premises if and only if every model of those premises (that is, every interpretation which makes those premises true) is also a model of the conclusion (one which makes the conclusion true).

Selected Works


Name: Alfred Tarski
Born: January 14, 1901
Died: October 26, 1983