The thing is, that lesson isn't quite right. Contracts do not need to be in writing most of the time unless you meet certain criteria. A verbal contract is as legally binding as one written on a napkin as one written on 30 sheets of legal paper. I'm trying to find the original case law but I can't remember their names. Basically some guy agreed to sell something at a restaurant and then tried to back out later saying he was drunk or joking, the courts enforced the sale.
