[stirner]

I am amazed that a professor would be so surprised by a student using the word "hence". Most professors I've had would probably have taken off points for using it over a simpler alternative like "therefore" or just a different sentence structure that incorporated the two sentences without needing an adverb to tie them together.

[tnecniv]

In every humanities class I've taken, the professor wouldn't grade us based on word choice nitpicking.