Disjunctive Proposition

The Disjunctive Proposition

It is sometimes called as alternative proposition, one which presents two or more alternatives of which one may be true. Its members are linked by the conjunctions “either…or”.

2 Kinds

a. Strict Disjunctive – one in which only one member is true and the other is false.

            Example: “Either he is an angel or a devil.”

b. Broad Disjunctive – one in which one member or more than one member may be true.

            Example: “Either Ana or Karen will pass the exam.”

Conditional Proposition

The Conditional Proposition

It is a compound proposition in which one clause asserts something as true provided that the other clause is true.

The first clause is the “if” clause and is termed the antecedent.

The second clause is the “then” clause and is called the consequent.

Example: “If he is the tallest in class, then he should be exempted for the P.E. demonstration.”

            Antecedent: If he is the tallest in class

            Consequent: then he should be exempted for the P.E. demonstration

The “if…then” are the connectives and indicate that if the antecedent is true, then the consequent must be true. The antecedent must flow with logical necessity into the consequent.

HYPOTHETICAL PROPOSITION

Hypothetical Proposition is a compound proposition which contains a proposed or tentative explanation.

A compound proposition consists of at least two clauses connected by conjunctions, adverbs, etc., which expresses the relationship between the clauses.

The clauses are simple propositions of the A-E-I-O variety.