Each of the following problems contains a short argument. For each argument,
identify the conclusion, the premise(s), and any additional premises or
counter-premises. Answers on the next page.
1. Wine is made by crushing grapes and eventually separating the juice
from the grape skins. However, the separated juice contains impurities
and many wineries do not filter the juice. These wineries claim the
unfiltered juice ultimately produces a more flavorful and intense wine.
Since these wine makers are experts, we should trust their judgment
and not shy away from unfiltered wine.
2. Phenylketonurics are people who cannot metabolize the amino acid
phenylalanine. There are dangers associated with phenylketonuria, and
products containing phenylalanine must carry a warning label that
states, “Phenylketonurics: contains phenylalanine.” In addition, all
children in developed societies receive a phenylketonuria test at birth.
Hence, at the moment, we are doing as much as possible to protect
against this condition.
3. During last night’s robbery, the thief was unable to open the safe. Thus,
last night’s robbery was unsuccessful despite the fact that the thief
stole several documents. After all, nothing in those documents was as
valuable as the money in the safe.
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