Two UFO possibilities:
1. UFOs are real, and the government has wreckage and alien body parts. Alternately, the entities are spiritual beings or early humans who somehow hide, or maybe humans from the future.
2. Numerous credible-sounding witnesses risked their reputations to spin an absurd set of similar-sounding lies. All of the pilot sightings and instrument readings and videos of objects are glitches, mistakes, or lies.
Which one sounds more likely to you?
Here’s one perspective: Discovering aliens, non-human high-tech creatures of any kind, or early humans with advanced technology hiding somewhere, or time travel, would be extraordinary — beyond anything humans have experienced.
Whereas… Finding out all the witnesses are CIA, pranksters, or just wrong, and all the physical evidence is made up would be . . . an ordinary human experience. So you can either believe the most extraordinarily unlikely thing is happening or you can believe the most ordinary and common thing is happening.
The way this “magic trick” works is that most people have trouble believing there could be so much solid-looking evidence for something untrue. But that situation is one of the most common situations in human experience.