A Play on Words

It never happened, but it could have...
Student reading a medical Journal to Teacher: What is the meaning of ideopathic?
Teacher, without looking up: "I don't know."
Student: "Ok, I'll look it up."

He walks to the dicitionary and looks it up... moments later the dictionary is slammed shut, and as he passes the teacher..."That was NOT funny."
Teacher:"My personal feeling is that it would be, if you checked the etymology."

If you are curious, or confused, see here and don't forget to check the etymology.