To misquote the amazing James Randi: if you throw a thousand reindeer off a cliff and none of them fly, you haven't proven that reindeer can't fly. You've prove

To misquote the amazing James Randi: if you throw a thousand reindeer off a cliff and none of them fly, you haven't proven that reindeer can't fly. You've proven that those specific one thousand reindeer either can't fly or chose not to fly.