"I think thing X is like thing Y in aspect A, so therefore X is like Y in aspect B."
"I can describe a fallacy that vaguely resembles your argument, so therefore your argument commits that fallacy."
Here, a simple example if what I say above is hard to follow:
> "I think thing X is like thing Y in aspect A, so therefore X is like Y in aspect B."
12 and 18 are alike in that both are greater than 10, so they are also alike in being greater than 5.
Please show where is the fallacy above, it can be mathematically proven and it has the shape of the fallacy you imply.
My argument having the shape of this fallacy does not imply it is a fallacy.