Answer to Question #267135 in Discrete Mathematics for Prash

Question

What rule of inference is used in each of these argu-

ments?

a) Alice is a mathematics major. Therefore, Alice is ei-

ther a mathematics major or a computer science major.

b) Jerry is a mathematics major and a computer science

major. Therefore, Jerry is a mathematics major.

c) If it is rainy, then the pool will be closed. It is rainy.

Therefore, the pool is closed.

d) If it snows today, the university will close. The uni-

versity is not closed today. Therefore, it did not snow

today.

e) If I go swimming, then I will stay in the sun too long.

If I stay in the sun too long, then I will sunburn. There-

fore, if I go swimming, then I will sunburn