The Dentist Is Pleased If, and Only If, I Both

question 228

Multiple Choice

The dentist is pleased if, and only if, I both brush and floss. The dentist is not pleased, but I brush. So, I don't floss.
-Working backward from the conclusion of this argument, which of the following is the most likely justification of the last step of the derivation?

• A) MT
• B) BMP
• C) BMT
• D) Simp
• E) DS

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Definitions:

Pathology

The medical specialty that focuses on determining the cause and nature of diseases by examining body tissues and bodily fluids.

Xeroderma Pigmentosum

A rare genetic condition causing extreme sensitivity to ultraviolet radiation, leading to increased risk of skin cancer.

Chemical Carcinogen

A substance or agent that can cause cancer by altering the genetic material in cells or interfering with cellular processes.

Viral Carcinogen

A virus that can cause cancer by infecting and altering the genetic material of a host's cells, leading to uncontrolled cell growth.