Quiz Snows

(Click on the cartoon to see the full image.)

(C)Copyright 2014, C. Burke.

Any resemblance to any fast food place is purely in your mind.

To be fair, I did elaborate on the definition of the word 'unless' to those who were still paying attention.
Giving a quiz when it snows isn't logically inconsisent... It's just really silly as 70-90% of my class will be absent.