That's why I have two hearts, in case one needs surgery. Seriously though, what kind of redundancy are you suggesting? I could have two cars, or two ovens, or

That's why I have two hearts, in case one needs surgery. Seriously though, what kind of redundancy are you suggesting? I could have two cars, or two ovens, or two hot water systems in case my first one breaks down, but I can get by with workarounds for a broken-down car, oven and hot water system anyway.