Why are some teachers so obtuse?

A teacher approached me today, she was having a problem with her network password. It was an easy fix, and she was about ready to go on her way.

"I have a presentation in a multimedia room tomorrow, what if I have a problem with logging in?"

she inquires.

I look at her, biting my tongue, and suggest that she go and check right now, today, so that if there is a problem we can fix it before her presentation.

The teacher responded with a look that implied I had saved the world from collapsing.

Duh!

Obtuse