contains a premise that is implausible unless the conclusion is presumed to be true fails to recognize that one set might have some members in common with each of two others even though those two other sets have no members in common with each other uses the key term "unsafe" in one sense in a premise and in another sense in the conclusion infers a particular causal relation from a correlation that could be explained in a variety of other ways
On some hot days the smog in Hillview reaches unsafe levels, and on some hot days the wind blows into Hillview from the east. Ttherefore, on some days when the wind blows into Hillview from the east, the smog in Hillview reaches unsafe levels.
The reasoning in the argument is flawed in that the argument