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Direction: A statement is given followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which…

Question and options

Direction: A statement is given followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which of them logically follows beyond a reasonable doubt from the information given in the statement.
Statement: All Coins are crows
Some crows are pens
Conclusion: I. No pen is coin
II. Some coins are pens
  1. Only Conclusion I follows
  2. Only Conclusion II follows
  3. Either Conclusion I or II follows
  4. Neither Conclusion I nor II follows

Answer and explanation

Correct answer: C - Either Conclusion I or II follows
All coins are crows and some crows are pens, but the pens need not overlap the coins (undistributed middle), so neither I nor II is certain on its own. But I (No pen is coin) and II (Some coins are pens) form a complementary pair: exactly one must be true. So 'Either I or II follows'.

Practice for these exams

  • CUSAT CAT Integrated IPR Ph.D.

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