The theory is interesting, but the engineering question is simple. How many times do I have to drill a hole? By redefining "hole" as the use of a drill, surfa

The theory is interesting, but the engineering question is simple. How many times do I have to drill a hole? By redefining "hole" as the use of a drill, surface-mount components don't use any holes. Cups and plates have no holes. Filled doughnuts have one hole, where the jam is injected. Doughnuts with a less-fattening centre were made without a hole, whatever Tim Hortons would have you think by selling you "doughnut holes".