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Statements: All cats are dogs. Some dogs are birds. Conclusions: I. Some cats are birds.
II. All dogs are cats. Which conclusion(s) logically follow?

Competition practiceSyllogism
  • AOnly II follows
  • BBoth I and II follow
  • CNeither I nor II follows
  • DOnly I follows

Step-by-Step Solution

The dogs that are birds need not be cats, so I does not follow. 'All dogs are cats' is an invalid reversal of the first statement, so II does not follow either.
Answer: C) Neither I nor II follows

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