 Many university professors , as well as teachers , lawyers , artists , writers , priests and other members of the Polish intelligentsia were arrested and executed , or transported to concentration camps , during operations such as <unk> @-@ <unk> . This particular campaign resulted in the infamous <unk> <unk> and the massacre of Lwów professors . During World War II Poland lost 39 % to 45 % of its <unk> and dentists , 26 % to 57 % of its lawyers , 15 % to 30 % of its teachers , 30 % to 40 % of its scientists and university professors , and 18 % to 28 % of its clergy . The Jewish intelligentsia was <unk> altogether . The reasoning behind this policy was clearly articulated by a Nazi <unk> : " In my district , [ any Pole who ] shows signs of intelligence will be shot . " 
