Subscription pricing
Most kinds of soil contain clay, and virtually every kind of soil contains either sand or organic material, or both. Therefore, there must be some kinds of soil that contain both clay and sand and some that contain both clay and organic material.
21.
The pattern of flawed reasoning in which one of the following arguments is most parallel to that in the argument above?
a
Most pharmacies sell cosmetics. Virtually every pharmacy sells shampoo or toothpaste, or both. Therefore, if there are pharmacies that sell both cosmetics and toothpaste, there must also be some that sell both cosmetics and shampoo.
b
Undoubtedly, most pharmacies sell cosmetics, for almost all pharmacies sell either shampoo or toothpaste, or both, and there are some pharmacies that sell both cosmetics and shampoo and some that sell both cosmetics and toothpaste.
c
Most pharmacies sell cosmetics. Nearly all pharmacies sell shampoo or toothpaste, or both. Therefore, unless there are some pharmacies that sell both cosmetics and toothpaste, there must be some that sell both cosmetics and shampoo.
d
Virtually every pharmacy that sells shampoo also sells toothpaste. Most pharmacies sell cosmetics. Therefore, there must be some pharmacies that sell both cosmetics and toothpaste and some that sell both cosmetics and shampoo.
e
Nearly all pharmacies sell either shampoo or toothpaste, or both. Therefore, since most pharmacies sell cosmetics, there must be some pharmacies that sell both cosmetics and toothpaste and some that sell both cosmetics and shampoo.
