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One most certainly can. 

First, where is the actual physical evidence of what you claim?

Second, where is the actual physical evidence of interstellar space travel, or even the physical evidence that it's possible?

Third, where is the actual physical evidence of any other lifeforms and that they have the ability of interstellar space travel?

And yet you wonder why you're considered a 'true believer' and a 'dunce'.

Whether any of that is possible or not, you are like a cave man with a spear saying  "are you telling me one day we drop a nuclear bomb from an airplane?" 

You haven't explained sh1t.  You can't even explain a world famous astronaut who walked on the moon, a major general, a Presidential chief of staff and counsel to another President, all of whom would disagree with you.  I know, I know, it's their psychosis...You can't explain why this has all been top secret for 80 years, if what you believe to be true is true.  Because you can't even do any of this, we all already know you are incorrect and it's waaaaaay beyond a reasonable doubt.  It doesn't take a rocket scientist (pun intended) to see you are incorrect.