There's no grounds for evidence as what we refer to as aliens and "UFO's" besides outright speculation, argumentum ad populum and such. People claim that a vast array of people spectating the same phenomena and coming to the same conclusion is grounds for evidence. It's not. Truth is, many of these people that claim that aliens have landed or been sighted always use ad hoc to cover their arguments; the craft used hyper advanced technology to hide itself, for example.
The only way for me to believe is to come face to face with an "alien". Even then, I'd be speculative. I don't believe what randomers post on the internet, and I certainly don't buy into this conspiracy theory.
The only way for me to believe is to come face to face with an "alien". Even then, I'd be speculative. I don't believe what randomers post on the internet, and I certainly don't buy into this conspiracy theory.