# Can You Reason Your Way Out of These Logic Problems?

Tony A.
The best way to understand the principles of logic, and to become a logical thinker is to actually do some logic. For example, can you work out the conclusion from these two premises? 1. All humans are mortal. 2. Socrates is human. Therefore? Yes, Socrates is mortal. The following 10 logical problems can all be solved by the same careful and considered thought, yet most people get a lot of them wrong. Let’s see how well you do. Just remember to ask yourself: "If these premises are true, what else must be true?"

Some cavemen make use of fire. Everyone who makes use of fire is intelligent. Therefore...
All cavemen are intelligent.
Everyone who makes use of fire is intelligent.
Some cavemen are intelligent.
None of these logically follow.

If someone oversleeps, they'll be late. Today they are not late. Therefore...
They overslept.
They didn't oversleep.
They are late.
None of these logically follows.

No one who's been detained for murder has been given bail. Smith is not being held for murder. Therefore...
Smith has been given bail.
smith hasn't been given bail.
Smith is innocent.
None of these logically follows.

No court which denies or suppresses evidence is impartial. Some courts are subject to political influence and do suppress evidence. Therefore...
Some courts subject to political influence are not impartial.
No courts that are subject to political influence are impartial.
Some courts subject to political influence are impartial.
None of these logically follows.

If you oversleep, you'll be late. You did not oversleep. Therefore...
You're not late.
You overslept.
You're late.
None of these logically follows.

All revolutions disrupt trade. Some disruptions of trade cause financial worries. Therefore...
Some revolutions cause financial worries.
Some revolutions do not cause financial worries.
All disruptions of trade cause financial worries.
None of these logically follows.

Any person who's just lost lots of blood will probably faint. Nobody who has a high probability of fainting is a safe pilot. Therefore...
Everyone who's lost lots of blood is a safe pilot.
Nobody who's just lost lots of blood is a safe pilot.
Every safe pilot has recently lost lots of blood.
None of these logically follows.

If knowledge exists, either some things are known with no proof or we are able to prove every premise by a previous argument indefinitely. We can not prove every premise by previous arguments indefinitely. Knowledge does exist. Therefore...
Everything that is known is provable.
There is no knowledge.
Some things are known without any proof.
None of these logically follows.

No one who wishes to help other people is reluctant to make sacrifices. Some masochistic people are not reluctant to make sacrifices. Therefore...
Some masochistic people wish to help other people.
Some masochistic people don't wish to help others.
All masochistic people wish to help others.
None of these logically follows.

Only those who use languages make generalizations. No animals use language. Some animals reason. Therefore...
Not every reasoning being makes generalizations.
Only reasoning beings make generalizations.
No reasoning being makes generalizations.
None of these validly follows.
Try again...
Oh dear, it seems as if you're not ready to pass this test right now. Well, contrary to popular belief, this isn't the end of the world. In fact - think of it as a beginning! Because the only place you can go from here is up. Keep training, and victory will one day be yours! Let's play again!
Nicely Done!
Awesome job! While you didn't answer every single question correctly, you still managed to get enough right to pass this test. Perhaps you'd like to try a few other tests and quizzes soon, to further practice your logic!
Terrific!
A perfect or almost perfect result! How is it that one person can be so unbelievably brilliant!? Be sure to keep taking tests like these, so that your vast intellect will never start to diminish, It would be a shame for such a mind to go to waste.
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