What were Dr. Strauss and Dr. Nemur's limitations in Flowers For Algernon?

They both were limited in intelligence.

Explanation:

Flowers for Algernon is a short story and a novel written by Daniel Keyes. The genre of both the story and the novel is science fiction.

The story is about Charlie, whose IQ is 68 and is chosen by Dr. Strauss and Dr. Nemur to perform a new surgical technique that increases intelligence. After the surgery, Charlie's IQ becomes 185. After becoming more intelligent, even more than his professors, Charlie came to know about the limitations in both of his mentors, Dr. Strauss and Dr. Nemur. In his observation on his mentors, he stated that he was well aware of their limitations. The limitation that Charlie was speaking about was the intellectual limitation of Dr. Strauss and Dr. Nemur.

So, the correct answer is intellectual limitations.