Study Material for SSC CGL, CHSL, MTS, Prasar Bharti, FCI Exams : Syllogism


The word ‘Syllogism’ is also referred to ‘Logic’. Syllogism is an important section of logical reasoning and hence, a working knowledge of its rules is required on the part of the candidate. Hence, it can be expressed as the ‘Science of thought as expressed in language’. The questions based on syllogism can be solved by using Venn diagrams and some rules devised with the help of analytical ability. With this unique characteristic, this test becomes an instrument of teaching the candidates to follow the rules and work as per the instructions without an error. Here, only the basic concept and rules, which have a bearing on reasoning faculty could alone help. There are some terminology which are used in syllogism.


It is also referred to as ‘Premises’. It is a sentence which asserts that either a part of, or the whole of, one sets of objects-the set identified by the subject term in the sentence expressing that sentence either is included in, or is excluded from, another set-the set identified by the predicate term in that sentence.

Types of Proposition

  1. Categorical Proposition: There is relationship between the subject and the predicate without any condition.
  2. Hypothetical Proposition: There is relationship between subject and predicate which is asserted conditionally.
  3. Disjunctive Proposition In a disjunctive proposition the assertion is of alteration.