If we can ignore everything we know about physics, and human behavior, then anything can make sense and seem possible. The universe as we know it does not allow

If we can ignore everything we know about physics, and human behavior, then anything can make sense and seem possible. The universe as we know it does not allow for faster than light travel (including teleportation), "warp drives," or time travel. Maybe Einstein got that all wrong, who knows for sure? All so-called UFO/UAP/alien visitors have more plausible explanations: human fallibility, gullibility, hoaxes, hallucinations (drug induced or otherwise), atmospheric and other natural phenomena, reflections, aircraft, balloons, etc. etc. We have no evidence of visitors from other planets. None. I really doubt "the government" (and not just ours -- all of them) could maintain a conspiracy of silence involving tens of thousands of people for over half a century. And I doubt an intelligent species would go to all the trouble to visit us only to sneak around and dissect cattle.