Logical Deduction

Directions to SolveIn 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.Give answer:
  • (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.

Q1: Statements: Some dreams are nights. Some nights are days. Conclusions:
  1. All days are either nights or dreams.
  2. Some days are nights.

A Only conclusion I follows

B Only conclusion II follows

C Either I or II follows

D Neither I nor II follows

E Both I and II follow

ANS:B - Only conclusion II follows

Explanation: Since both the premises are particular, no definite conclusion follows. However, II is the converse of the second premise and thus it holds.



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