If you came upon a truck with a crumpled bumper, crunched tightly against a cement barrier, you could easily deduce that the crumpled bumper was the result of the truck hitting into the barrier at high speeds. Even if you were not familiar with automobiles or cement barriers, you could assess your hypothesis by controlled tests, and you would find that if a truck were driven at high speed into a cement barrier a crunched bumper, (at the very least), would result. Without having ever observed the actual accident, you could reasonably find the cause of the crunched bumper, and you can further show your theory to be highly probable and logical through tests.
Let us say a hypothetical person found the same truck in a parking lot, with the same large crunch, of no recognizable size or shape, in the bumper. Suppose that all of the trucks in the area were inoperative, and there were no cement barriers nearby so that tests could not be performed. This person formulated a theory that the crunch in the bumper of the truck was the result of smashing into a "Hynod". A Hynod might, or might not be a physical object, but at any rate had never actually been seen. The truck itself could be examined, and tested, but examining the theoretical Hynod was impossible. Would the theory that a Hynod caused the crunched bumper be a scientific theory? The thought of the theory being called scientific is ridiculous. The event could not be replicated, having no running automobiles. The theory could not be tested in any way. The result has been removed from the cause, and the cause is unseen. On what could a person base their conclusion that the truck ran into a Hynod, other than conjecture? Because of a lack of information and a surplus of surmise, the theory could not be scientific. One might argue that the crunch was evidence of the Hynod, but the crunch could have come about in any number of ways.
The "Hynodic theory" would be unscientific because we could not examine, test, or observe it in any way--is this true?