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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: All tigers are lions. No cow is lion. Some camels are cows. Conclusions:
  1. Some lions are camels.
  2. No camel- is tiger.
  3. Some tigers are cows.

A None follows

B Only I follows

C Only II follows

D Only III follows

E Either I or II follows

ANS:A - None follows

Explanation: All tigers are lions. No cow is lion. Since both the premises are universal and one premise is negative, the conclusion must be universal negative (E-type) and shouldn't contain the middle term. So, it follows that 'No tiger is cow'. Some camels are cows. No cow 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 camels are not lions'. Some camels are cows. No tiger is cow. 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 camels are not tigers'.



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