Well, well, well
The mathematician says "2" The Physicist says "2, plus or minus 0.1" The engineer says "Probably around 2, but let's say 3 to be on the safe side".
Pupil: Up and down or across Teacher: What do you mean Pupil: Well up and down makes a 3 or across the middle leaves a 0!
Me: "The abs hiding under this protective layer of you're grounded."
Because it was s knotty pine!
My ex wife.