How does Atticus explain rape to Scout?

In Harper Lee's famous novel To Kill a Mockingbird, the main character, Scout, is very young. In chapter 14 of the book, she asks her father, the lawyer Atticus Finch, to explain what rape is after Calpurnia refuses to explain. As Scout tells us, "He sighed, and said rape was carnal knowledge of a female by force and without consent." 
Essentially, Atticus purposely does not explain to Scout what rape is. Obviously, if you repeated this quote from Atticus to a child, they would still be completely clueless. It makes sense that he wanted to avoid giving a straightforward answer—rape is a pretty tough subject to discuss with your young daughter. However, it does make Atticus a bit of a hypocrite. He specifically told Jack earlier in the book to not to beat around the bush when a child asks you a question.