Weak Analogy: When the conclusion of an argument depends upon a comparison between two (or more) things that are not similar in relevant respects, the fallacy of weak analogy is committed. This fallacy generally follows the pattern:
1. A has characteristics w, x, y, and z.
2. B has characteristics w, x, and y.
3. Therefore, B probably has characteristic z, too.
4. But characteristics w, x, and y are not relevant to z or,
5. A and B have differences relevant to z which are ignored by the arguer.