Ad hominem is when "an argument is rebutted by attacking the character, motive, or other attribute of the person making the argument, or persons associated with

Ad hominem is when "an argument is rebutted by attacking the character, motive, or other attribute of the person making the argument, or persons associated with the argument, rather than attacking the substance of the argument itself." [1]. This clearly seems to fit. Ad hominem is not always a fallacy: if there were some new facts presented, or if the argument was so complicated that you couldn't evaluate its validity yourself (like happens often in science and other technical fields), then the source of the argument would be relevant. Neither of those is true in this case. The article's argument isn't very convincing to me on its own merits, but I don't see how it's made worse by the fact that the author may have been paid to write it. [1] https://en.wikipedia.org/wiki/Ad_hominem https://en.wikipedia.org/wiki/Ad_hominem