The oldest man had just celebrated his hundredth birthday and the reporter of a local paper called on him for an interview.Having congratulated the old man,the reporter asked a few questions. "To what do you own your long life?"the old man thought for a moment and then holding up his hand and counting the items on his fingers,began,"I never smoked,drank,or overate and always rise at six in the morning." "But ,"the reporter didn't agree,saying," I had an uncle who acted in that way,yet he only lived to be eighty. How do you explain the cause of that?" "He didn't keep it up long enough,"was the calm reply. The reporter was interested in _______