Nope, no deliveries available here. Also there is no such thing as a "shop" here, by which I suppose you mean a shop that specializes in particular items? Butcher, baker, cheese store etc.? Everything is a supermarket and the nearest one is about a mile. Nothing in Nevada is what you could call "densely populated," and my town is fairly small.
You don't necessarily have to repeat an event to test the explanation of that event.
You see evidence A, and you speculate B; because B would leave A behind, wouldn't it?
You can't test this by going back in time, but you can test it by asking what else B would leave behind. Assume B, predict the expected consequences (other than A, which you already know), and then check if they're there as well. If they are, your confidence in B is strengthened.