What is the flaw in this reasoning?

a) only some city governments are banning the use of trans fats
b) trans fat like all fats, should only be consumed in moderation
c) no evidence is given that other kinds of fats would be banned

The flaw in this reasoning is that just because some city governments are banning the use of trans fats, it does not necessarily mean that trans fats are the only fats that should be consumed in moderation. In addition, the fact that there is no evidence given that other kinds of fats would be banned is also irrelevant to the argument that trans fats should only be consumed in moderation. It is possible that other kinds of fats could also have harmful effects on health and should be limited in consumption.