Re: Obligatory HAL reference
Given that the Nazis sterilised deaf adults
Most likely same as the Soviets. There were different rules inside and outside the house. KGB ran full scale research on radiology and genetics while officially supporting the party line that this is an invention of the Capitalist propaganda.
The Gestapo employed a small number of deaf people who had professional lip reading ability exactly because the best lip readers are deaf. I have come across references to this in both Soviet and Western historical works so I have no reasons to believe it is not true (Soviets were lamenting that they had a couple of agents in Poland picked this way). It's been a while - I came across this 20+ years ago so cannot remember the exact source.
Biting the hand that feeds IT
