PT124.S1.Q3 > Question

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The columnist comes to the implied conclusion that humans share diseases with cats for genetic reasons. Why? Because many diseases are genetically based, and cats and humans are close genetic relatives—as demonstrated by a close correlation between the species' genes.

In order for the reason why humans and cats share so many diseases to be “clear,” the columnist must assume that the diseases humans and cats share are genetically based diseases. The columnist must also assume that any genetic differences between humans and cats are not the type of difference that would change the species' susceptibility to diseases.

This is irrelevant, because the argument is about why cats share these diseases with humans in the first place, not about either species' immunity.

The columnist’s entire argument is based on the assumption that these shared diseases are genetic. If shared diseases aren’t genetic, then the columnist’s conclusion doesn’t follow.

Even if this were true, humans and cats still share many diseases. This has no impact on the columnist's argument that these diseases are clearly shared due to genetics.

Even if these diseases are mild, humans still share them with cats. The strength of the diseases doesn't weaken the columnist’s argument that they are shared for genetic reasons.

This just reaffirms something stated in the stimulus. Either way, the degree of relationship between humans and any mammal other than cats has no bearing on the columnist's argument.

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