No, an ad-hominem would imply an attack on the character or worth of Rand personally. gnosis's comment was merely a bald assertion about the novel, though indee

No, an ad-hominem would imply an attack on the character or worth of Rand personally. gnosis's comment was merely a bald assertion about the novel, though indeed not an argument as such. Of course, your Rand quote was also pretty much just a bald assertion without any supporting argument, so I guess it works out.