Alien cover up

[CapnAwesome]

We have no evidence for any of this.  It is more likely to be productive to explore possible answers for which we can reasonably expect to gather evidence.

But that is different from deny in principle answers for which we are unlikely to be able to gather evidence.

Ah, but in all likely hood we would be able to gather evidence if Aliens existed on earth. It's very hypothetical at best that they'd have some means of not being photographed or being able to block out all traces of their existence. I mean, how? Advanced technology that requires no explanation is pretty much the same as saying magic.