Logical Reasoning - Logical Deduction
Exercise : Logical Deduction - Section 1
Directions to Solve
In each question below are given two statements followed by two conclusions numbered I and II. You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. Read the conclusion and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
- (A) If only conclusion I follows
- (B) If only conclusion II follows
- (C) If either I or II follows
- (D) If neither I nor II follows and
- (E) If both I and II follow.
Statements: All roads are waters. Some waters are boats.
- Some boats are roads.
- All waters are boats.
The first premise is A type and distributes the subject. So, the middle term 'waters' which forms its predicate, is not distributed. The second premise is I type and does not distribute either subject or predicate. So, the middle term 'waters' forming its subject is not distributed. Since the middle term is not distributed even once in the premises, no definite conclusion follows.
Statements: No bat is ball. No ball is wicket.
- No bat is wicket.
- All wickets are bats.
Statements: All flowers are trees. No fruit is tree.
- No fruit is flower.
- Some trees are flowers.
Statements: Every minister is a student. Every student is inexperienced.
- Every minister is inexperienced.
- Some inexperienced are students.
Statements: All roads are poles. No pole is a house.
- Some roads are houses.
- Some houses are poles.