## Test Your Logical Thinking #2

Difficulty: (explanation of difficulty)

Instructions: Ten sets of premises are given below in the "Premises" table. Your job is to assume that the premises as given are true, and then determine whether the conclusion follows logically from the premises. Check the "True" button if it does, and the "False" button if it does not. When done, select the "Check Answers" button to check your answers.

• All dogs are mammals.
• All mammals are animals.
All dogs are animals.
True.
• If Ted votes for the liberal candidate, then he is not a conservative.
• Ted is not a conservative.
Ted votes for the liberal candidate.
False.
• There are three people in the room.
• Everyone in the room is either left-handed or right-handed, but not both.
At least two people in the room are of the same handedness.
True.
• Donny is a student starting high school.
• Donny has never been interested in school and his grades have always been poor.
• Donny just took an IQ test, and his score was 79, well below average.
It is more likely that
(a) Donny takes part in an experimental drug/therapy program to increase learning and motivation, which is highly successful, and four years later Donny graduates with the top grade in his class
than
(b) Four years later Donny graduates with the top grade in his class.

False.
• If I study for the test tonight, then I will not have fun tonight.
• If I do not study for the test tonight, then I will get a bad grade on the test.
If I have fun tonight, then I will get a bad grade on the test.
True.
• A healthy diet low in saturated and trans fats may reduce the risk of heart disease.
• Golden brand margarine is low in saturated and trans fats.
Using Golden brand margarine reduces the risk of heart disease.
False.
• Smithville is around 50 kilometres north of Jonesborough.
• Jonesborough is around 50 kilometres north of Browntown.
Browntown is closer to Jonesborough than Smithville.
False.
• If a book costs over \$100, then it is overpriced.
If a book is overpriced, then it costs over \$100.
False.
• No birds are mammals.
• Some mammals are flying squirrels.
Some flying squirrels are not birds.
True.
• All men are mortal.
It is not necessarily true that all mortals are men.
True.

If you are interested in other logical-thinking puzzles, you may also want to try Test Your Logical Thinking and Wason's Four-Card Task.