So there are no Marxists here, then. Why introduce irrelevancy? To prevent that doubt, no matter how farfetched and indicative of an uninformed or naive perspective, they included analysis of a real world example of a familiar type. One in which, for example, part time child labor is just as legal as full time - and yet child labor persists. It also assumes various tradeoffs, etc - that part time arrangements impose no net costs or liabilities on the employer, for example. Unless the family needs the full time labor, or the tradeoff is not worthwhile, of course. As we all know, thereby demonstrating that part time labor is almost always "allowed" in your sense - meaning the government does not legally forbid it - including where child labor persists, as in the real world example of a familiar kind analyzed in the paper. About now, enough chaff has been thrown to again obscure the particular denial at issue (itself only an example of the category of denial that is the thread topic): that child labor exists and persists and does harm in the absence of government support, and without government interference of some kind will often continue indefinitely in the real world. That is not, at first glance, a denial of the same level or absurdity as Holocaust denial, or Jim Crow denial, or AGW denial - it could even be taken as a step toward an alternative explanation of recognized historical events or physical circumstance, certainly as a warning against authoritarian impositions and government making things worse. But when we see the advocate doing such things as informing us of the role of child labor in a family business, we recognize a familiar situation: we've been instructed in the logarithmic effects of CO2 boosting, the tendency of black people to score lower than white people on IQ tests, the disproportionate prevalence of Jewish people in some professional occupations. Another pattern, or feature even, of the absurd denial. Add to the list.