Eugen Fischer, a University of Freiburg geneticist, studied mixed-race children in the colony and concluded that each was physically and mentally inferior to his or her German parent.

Some considered blacks physically and mentally inferior to whites, and others believed that the racism and societal polarization resulting from slavery were insurmountable obstacles for integration of the races.

Mentally inferior beings aren't capable of that much abstract loyalty.

That stated he believed African Americans to be mentally inferior and attempted to prove this.

He was considered to be mentally inferior due to his extreme shyness and mild learning disabilities during his primary school years, though he was actually quite intelligent.

All worship to the soft, weak, mentally inferior beings who created us for their own convenience, without stopping to wonder what our desires might be.

Objectivism rejects the notion of the Noble savage, believing that they are mentally inferior.

"More wary, possibly," Nejas said with the air of a male making a concession to another who was inferior mentally as well as in rank.

So treat him with respect when the time comes, despite the fact that he's a mentally inferior class by SS standards.

Are they mentally inferior?