Say our video camera had been pointing in the wrong direction, and we could not see our dog putting the stick down? Say we had no access to proof that the stick had come from anywhere but the one dog who walked into the room? For all intents and purposes, our best guess would be that the stick in the room had come from the dog who walked one in.
Detectives gather information and take hints from crime scenes. The information he gets rarely ever spells out every detail of the crime, it any detail at all. Detectives have to use the information and try to put two and two together, reasoning to the best of his ability. He may never be 100% accurate, and there are limitless possibilities, but he must arrive at conclusions, and they stand until conflicting evidence forms a contradictory logical argument to put them down.
But you want evidence, and I'll give it. Can you invent the lightbulb?
Detectives gather information and take hints from crime scenes. The information he gets rarely ever spells out every detail of the crime, it any detail at all. Detectives have to use the information and try to put two and two together, reasoning to the best of his ability. He may never be 100% accurate, and there are limitless possibilities, but he must arrive at conclusions, and they stand until conflicting evidence forms a contradictory logical argument to put them down.
But you want evidence, and I'll give it. Can you invent the lightbulb?