distributes more free samples. For that matter, the medical community may have simply
been mistaken in thinking that Acid-Ease was more effective. In short, the number of
prescriptions by itself is not conclusive as to whether one product is actually better than
another.
The third assumption is that the milder non-prescription forms of Acid-Ease and
Pepticaid will be analogous to the full-strength prescription forms of each. But this
might not be the case. Suppose for the moment that the greater effectiveness of
prescription Acid-Ease has been established; even so, the non-prescription form might
not measure up to non-prescription Pepticaid. This fact must be established
independently.
In conclusion, this ad does not provide enough support for its recommending non-
prescription Acid-Ease over non-prescription Pepticaid. To strengthen its argument, the
promoter of Acid-Ease would have to show that the comparison between the number
of prescriptions is based on the same time period; its effectiveness is the main reason
more doctors have prescribed it, and the comparative effectiveness of the two non-
prescription forms is analogous to that of the prescription forms.
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