There are only three topics, the ability to reason and argue on which automatically deprives the status of a Reasonable Man:

1) "Only in our village are the workers, and in the neighboring all the thieves, and the district center in general has been eaten" (and vice versa);
2) Only the Russian People are the bearers of Spirituality and Intellect! (and vice versa);
All the men weep like horses, and all the women are dumb, lying on the couch and demanding money (and vice versa).

A creature noticed in the ability to seriously scratch such subjects can be thrown into the bioreactor without the slightest risk to society as a whole. This is the way, robots.