search

Khan / khan-exercises

A (deprecated) framework for building exercises to work with Khan Academy.
http://www.khanacademy.org/
1.61k stars 863 forks source link

logical_arguments_deductive_reasoning #83516

Open wejo7185 opened 10 years ago

wejo7185 commented 10 years ago

If I won't play in the game tomorrow, it could be because I broke my leg AFTER practice. I might have gone to practice and on the way home broken my leg or gotten hit by a bus...So one cannot conclude that I did NOT go to practice....or am I missing something? (I am old!) Thanks.

wejo7185 commented 10 years ago

Well, the original question wasn't posted. Poop.

wejo7185 commented 10 years ago

Here: If I go to practice today, then I will play in the game tomorrow. I will not play in the game tomorrow.

Which to choose? 1) I did not go to practice today

2) No logical conclusion possible

The correct answer is 1). But If I won't play in the game tomorrow, it could be because I broke my leg AFTER practice. I might have gone to practice and on the way home broken my leg or gotten hit by a bus...So one cannot conclude that I did NOT go to practice....or am I missing something? (I am old!) Thanks.