Western Logic

From ‘First and Last things’. H.G.Wells “There is another infirmity of the mind to which my attention has been calledby

A Syllogism needs to be both Sound and Valid. Soundness is concerned with the Truth of the Propositions while Validity

To define error, we must first define falsity as error is a species of falsity.  Falsity in general is the

There are four types of reasoning: 1. Demonstration: When the propositions on which the arguments are based are true, it

When we are dealing with the concept of Contrary we are basically dealing with the qualities of the propositions. If

In Syllogistic logic, we generally draw conclusion from two premises. Since there are two or more premises and conclusion is

There are three and only three Laws of Thought. They are: the Law of Identity, the Law of Contradiction, the

Reductio-ad-absurdum is a technqiue used to verify the validity of arguments. It is same as Tarka. In this, we assume

A typical proposition in reduced form consists of two premises and a conclusion. However, generally a person speaks to us

A typical Syllogism is composed of two premises and a conclusion as follows: All men are mortal Socrates is man