I'm not trying to talk you out of your position. I respect anyone who engages in rational thought on any given topic.

When I look at UFO/alien visits, I'm struck by two things.

First, Occam's Razor (as an example) would tell us that the argument that requires the least assumptions should form our starting point of investigations. The explanation for most UFO incidents would seem to have terrestrial explanations that, to me, require little assumptions compared to the large assumption that foreign living beings are visiting us. So I try, as a sceptic, to start my investigation assuming these phenomena are of "ordinary" origin.

Second, in the absence of any clear evidence, I struggle to imagine any conclusion about alien life that I can develop that isn't built on speculative premises. Having no clear body of facts, I can build no compelling conclusions.

Because of these two premises, I hold that any rational investigation of UFO is so rich in speculation and assumption, it can offer me very little certainty. And while exciting and sometimes compelling, I am personally forced to relegate it to entertainment rather than philosophical examination.

I'm a total amateur in this field though. I have a few undergrad courses and a lot of personal study, but I am hardly philosophically literate yet. Still a fun thought exercise!