Dinosaur Meme

Valid or Invalid? - The Syllogisms

Syllogism 1 of 15

Remember, we're interested only in whether the argument is valid; that is, whether the conclusion follows as a matter of necessity given the truth of the premises. Just select "Valid" or "Invalid" from the drop-down list below, then press Next.

All cartoons are illustrations
No photographs are illustrations
Therefore, some photographs are not cartoons
Valid or invalid?


Really Deep Thought

Man is by his constitution a religious animal; atheism is against not only our reason, but our instincts.
   --Edmund Burke.


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