Definition:
language functions through comparisons, and it is common and useful to argue the validity of one point by comparing it to another, but often the comparison suggests that two thing are more alike than they really are.

Faulty Analogy

Example:
Fallacy Ex: "If we legalize gay marriage, next we'll legalize marriage between men and their pets."
Fallacy Ex: "Iraq is another quagmire, just like Vietnam."
Fallacy Ex: "Feminazi."
Fallacy Ex: “Meat is murder.”