Joke for the Day

"Johnnie."

"Yes, teacher."

"If there are twenty sheep in a field, and one gets out through a hole in the fence, how many sheep are left in the field?"

"None, teacher."

"Johnnie, there are still nineteen sheep left in the field. Obviously you need to know your arithmetic better."

"Sorry, teacher, but I'm not wrong now, because I do know sheep!"