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Vacuum cleaner salesperson: To prove that this Super XL vacuum cleaner is better than your old vacuum cleaner, I ran your old vacuum once over this dirty carpet. Then I ran the Super XL over the same area. All that dirt that the Super XL picked up is dirt your old vacuum left behind, proving the Super XL is the better vacuum.
10.
The vacuum cleaner salesperson's argument is most vulnerable to the criticism that it
a
ignores the possibility that dirt remained in the carpet even after the Super XL had been used in the test
b
takes for granted that the Super XL will still perform better than the old vacuum cleaner when it is the same age as the old vacuum cleaner
c
takes for granted that because the Super XL outperforms one vacuum cleaner it is the best vacuum cleaner available
d
ignores the possibility that the amount of dirt removed in the test by the old vacuum cleaner is greater than the amount of dirt removed by the Super XL
e
ignores the possibility that if the Super XL had been used first it would have left behind just as much dirt as did the old vacuum cleaner