Yesterday I was in the mall having a watch battery installed. I was in a store that sells a lot of watches, but I don't want to mention which store because it's a nice place and I don't want to get them in trouble. Anyway as I was knifing my way through this store whose name and other products I don't want to mention, I noticed a sign on the counter. It said that the store was not responsible for any damage that occurred to a watch that was left with them.

I noticed the sign just after I left my watch with them.

Fifteen minutes later I returned and found my watch, intact, a new battery causing the mechanism to whirr along nicely. But if I had returned to find the watch in a dust bin, having been swept there by the person who had just dropped an anvil on it, that person would not have been responsible? Then who is?