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Logical Deduction

Directions to SolveIn each of the questions below are given three statements followed by three conclusions numbered I, II and III, You have to take the given statements to be true even if they seem to be at variance from the commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Q1: Statements: No rabbit is lion. Some horses are lions. All rabbits are tables. Conclusions:
  1. Some tables are lions.
  2. Some horses are rabbits.
  3. No lion is table.

A None follows

B Only either I or III follows

C Only II and III follow

D Only III follows

E None of these

ANS:B - Only either I or III follows

Explanation: Some horses are lions. No rabbit is lion. Since one premise is particular and the other negative, the conclusion must be particular negative (O-type) and should not contain the middle term. So, it follows that 'Some horses are not rabbits'. All rabbits are tables. No rabbit is lion. Since the middle term 'rabbits' is distributed twice, the conclusion must be particular. Since one premise is negative, the conclusion must be negative. So, it follows that 'Some tables are not lions'. Since I and III involve the same terms and form a complementary pair, so either I or III follows.



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