Thursday, October 14, 2010

Info Thursday
Logic Puzzles

So, yesterday my sister came into my room with several logic puzzles. I had told her previously that I wanted to try my hand at logic but I had forgotten about it until now. In any event, she gave me two if statements and said I was not supposed to assume anything not expressly written in the statement. The statement could also go contrary to reality but you still have to follow its logic and not reality's. One of the statements I did perfectly at but the other I made a fatal flaw. Below are the statements followed by the questions that pertained to them. See if you can guess which one I flubbed up on. Then, if not, I'll tell you, but I'm also curious if anyone makes the same mistake. So try the problems, IF YOU DARE...or, you know,...if you wanna...I won't make you or anything...

1. If an animal is a lion, it is a feline

i. An animal is not a lion. Is it a feline?
a. yes
b. no
c. can't tell

ii. An animal is not a feline. Is it a lion?
a. yes
b. no
c. can't tell

iii. An animal is a feline. Is it a lion?
a. yes
b. no
c. can't tell

2. If you eat your dinner, then you get dessert

i. You don't eat your dinner. Do you get dessert?
a. yes
b. no
c. can't tell
d. is it cookies?

ii. You don't get dessert. Did you eat your dinner?
a. yes
b. no
c. can't tell

iii. You get dessert. Did you eat your dinner?
a. yes
b. no
c. can't tell

Highlight the following for the answers: c, b, c - c, b, c

So which do you think I got wrong? It was the second one about dinner and dessert. It's because of the implied threat that I got the first and the third questions wrong since the logic is that it is possible that you could get dessert if you don't eat your dinner. In my experience, people don't usually say that unless it's different from the alternative, though, so I wasn't even consciously thinking it was an assumption.

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