Practice30Create account

Statements: All keys are locks. All locks are doors. Some doors are windows. Conclusions: I. Some keys are windows.
II. Some windows are locks. Which of the conclusions follows?

Competition practiceSyllogism
  • ANeither conclusion follows
  • BOnly conclusion II follows
  • COnly conclusion I follows
  • DBoth conclusions I and II follow

Step-by-Step Solution

Keys ⊆ locks ⊆ doors, and only 'some doors are windows' is given. The doors that are windows need not be locks or keys, so neither 'some keys are windows' nor 'some windows are locks' is guaranteed. Neither follows.
Answer: A) Neither conclusion follows

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Syllogism practice questions

More Syllogism practice

Statements: All pens are books. All books are chairs. Conclusions: I. All pens are…Statements: Some cats are dogs. No dog is a lion. Conclusions: I. Some cats are not…Statements: All roses are flowers. Some flowers are red. Conclusions: I. Some roses are…Statements: All pens are books. All books are papers. Conclusions: I. All pens are…Statements: All roses are flowers. Some flowers are red. Conclusions: I. Some roses are…