Alien motherships: Pentagon official floats a theory for unexplained sightings

[wnylib]

39. Speculation, called a hypothesis in science,

is only a part of what science is about. Critical examination of a hypothesis is an essential part of science in order to establish facts and to then assemble facts into a theory. Unsubstantiated speculation gets rejected, or "snuffed out." In order to establish facts and then a theory based on those facts, unsubstantiated speculations get discarded in the process of keeping the ones that are substantiated by evidence.

Regarding UFOs, all we know is that some people report seeing objects in the sky that they cannot identify as a specifically known thing. Most times, when investigated, a UFO report turns out to have an ordinary explanation. So far, there is zero evidence that UFOs are alien spaceships. The initial question about UFOs is, "What is that object that I don't recognize?" To then speculate as a response that it is a spaceship from another galaxy or planet within our own galaxy is a tremendous leap without any basis. The spaceship speculation leaps to the idea that a UFO is something that is made, either by humans on earth or by aliens from somewhere else, and is not a natural phenomenon.

That speculation, which has zero evidence to back it up, then gets other unfounded speculations piled on top of it, like the notion that ancient civilizations were created by aliens.

By that time you've got enough imagined notions to create a sci fi novel or film, but nothing that is substantiated by evidence.