Faden: Most of our exercise machines are still in use after one year. A recent survey of our customers shows this.
Greenwall: But many of those customers could easily be lying because they are too embarrassed to admit that they don’t exercise anymore.
Faden: You have no way of showing that customers were lying. Your objection is absurd.
Which one of the following most accurately describes a flaw in the reasoning above?
(A)
Greenwall takes for granted that many customers have stopped using the equipment but are too embarrassed to admit it. - WRONG.
(B)
Greenwall presumes, without giving justification, that most people are dishonest about their personal habits. - WRONG.
(C) Faden presumes, without providing justification, that the
more conclusive the evidence is for a claim, the less believable the claim becomes. - WRONG. Evidence is not presented by Faden: it's just the claim that is given. Hence conclusiveness of the evidence is not established.
(D) Faden presumes, without providing justification, that the
evidence for a claim has not been undermined unless that evidence has been proven false. - CORRECT. Faden simply assumes that the evidence on which his claim is based is true as it is. It cannot be countered. And this is where the argument makes a flaw.
(E)
Greenwall ignores the possibility that some people stopped using the equipment but were not embarrassed about it. - WRONG.
Faden makes a claim for which Greenwall his pov that goes against it. And to this Faden again lays down his pov in defence of his earlier claim by simply refuting Greenwall's pov. Faden does it without giving much inputs. Hence Faden's claim is questionable rather Greenwall's.
Only C and D stand some ground. What D does is it gives a base that shows that the evidence based in whihc Faden makes a claim is not undermined and this is till that evidence is falsified.
Answer D.