A well-known former quarterback is probably very adept at analyzing the relative strengths of football teams. However, efforts by television advertisers to suggest that the quarterback is an expert on pantyhose or popcorn poppers should arouse skepticism among viewers. The same response should result when a popular television actor, who is frequently cast in the role of a doctor, appears in a commercial to endorse a brand of decaffeinated coffee. His views on television acting would deserve attention
since he has had considerable experience in that field, but viewers have every right to doubt his authority in coffee advertisements.
Which one of the following is a presupposition essential to the reasoning in the passage above?
(A) The
strength of authoritative evidence as legitimate proof is
closely related to the authority’s degree of expertness in the area in question. - CORRECT. If not then the argument falters.
(B) Practical experience
counts for more than academic training in assessing the competence of authorities. - WRONG. It might be so but this is not what helps build the argument as it is.
(C) The
only kind of evidence being used in many television commercials is appeal to authority. - WRONG. Irrelevant.
(D) The viewing audience is
not sufficiently capable of evaluating authoritative appeals in advertisements. - WRONG. Does not impacts the highlighted text.
(E) Television viewers will
somehow mentally transfer the credibility of celebrities in one area of expertise to another represented by the product being advertised. - WRONG. This does not let's audience question authoritativeness.
Answer A.