 E.I.J. Rosenthal already pointed to the different evaluation of the “weeds” by Alfarabi and Avempace (Rosenthal 1951). Avempace borrows the concept from Alfarabi who saw these men as a danger in the imperfect as well as the perfect city. Avempace saw the virtuous city free of weeds, because it is free from false opinions. Weed-men spring up only in the imperfect cities, and they can help in correcting their views. However, he realized that they were strangers in the cities or societies of his time, which all belonged to the corrupted types, and he did not believe that these societies could be rehabilitated; he abandoned Alfarabi at this point and addressed the “weed-men”.