PrepTest 44, Section 3, Question 1
Jones fell unconscious on the job and it was suspected that he had swallowed a certain chemical, so he was rushed to the local hospital's emergency room. In making her diagnosis, the emergency-room physician knew that if Jones had swallowed the chemical, a deficiency in the content of a mineral in his blood would result. She also knew that deficiency in the mineral causes inflammation of the skin. Since Jones's skin was not inflamed when he was admitted to the emergency room, the physician concluded that Jones had not swallowed the chemical.
Jones fell unconscious on the job and it was suspected that he had swallowed a certain chemical, so he was rushed to the local hospital's emergency room. In making her diagnosis, the emergency-room physician knew that if Jones had swallowed the chemical, a deficiency in the content of a mineral in his blood would result. She also knew that deficiency in the mineral causes inflammation of the skin. Since Jones's skin was not inflamed when he was admitted to the emergency room, the physician concluded that Jones had not swallowed the chemical.
Jones fell unconscious on the job and it was suspected that he had swallowed a certain chemical, so he was rushed to the local hospital's emergency room. In making her diagnosis, the emergency-room physician knew that if Jones had swallowed the chemical, a deficiency in the content of a mineral in his blood would result. She also knew that deficiency in the mineral causes inflammation of the skin. Since Jones's skin was not inflamed when he was admitted to the emergency room, the physician concluded that Jones had not swallowed the chemical.
Jones fell unconscious on the job and it was suspected that he had swallowed a certain chemical, so he was rushed to the local hospital's emergency room. In making her diagnosis, the emergency-room physician knew that if Jones had swallowed the chemical, a deficiency in the content of a mineral in his blood would result. She also knew that deficiency in the mineral causes inflammation of the skin. Since Jones's skin was not inflamed when he was admitted to the emergency room, the physician concluded that Jones had not swallowed the chemical.
Which one of the following, if true, would undermine the physician's conclusion?
Jones did not know that the chemical was dangerous.
Jones had suffered inflammation of the skin in the past.
It takes 48 hours for the chemical to bring about deficiency of the mineral in the blood.
Jones often worked with the chemical.
Deficiency in minerals other than the mineral in question can cause inflammation of the skin.
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