A kid hands in his state test (multiple choice) with two answers circled for one question. 

Me: “You can only choose one answer for each question.”

Kid: “Well, I know but I couldn’t decide between B and C. So I’m just going to do both.”

Me: “You can’t do both. If you choose both, it’s automatically wrong.”

Kid: “Ok.”

(Does nothing) 

Me: “Please choose one answer.”

Kid: “No thank you. I’ll take my chances.”

I’m not sure you understand how chances work.