"Acolyte, thar isn't tangible proof. However many scallywags have encountered ghosts an' such an' science has yet t' disprove that ghosts exist or any other form o' life after death, Ya horn swogglin' scurvy cur, by Blackbeard's sword!"
So? Subjective experience =/= evidence. Most people probably aren't lying when they say they've encountered ghosts, but what did they actually see? Something totally paranormal, or something they, personally, could not account for, to the best of /their/ knowledge and understanding? There's no evidence ghosts exist, maybe a handful of unexplained encounters are out there, but evidence of ghosts this does not make.
"To th' public knowledge, scientists have yet t' determine anythin' tangible about alien phenomenons. If they do exist then that opens up a whole new notion on th' creation/evolution theory."
It wouldn't alter the position of science one bit. Perhaps Biblical Creationists would have to go back to the drawing board, but the discovery of organisms not native to Earth would have zero effect on the abiogenesis study or the theory of evolution. In fact, alien life could possibly even augment the universal propositions of science.
"It's not unproductive considerin' these thin's happen, I'll warrant ye. People see thin's, assume that they be real an' it turns out that thar be endless possibilities because thar's another person in a hospital room observin' them. That basically means that unless ye can prove 'tis not happenin' t' ye, then it very well could be happenin' t' ye an' that could mean that thar is a God observin' ye or a doctor or an alien or a manbearpig"
This is why science makes use of tools for taking measurements of the phenomenon being studied. If it can not be observed by anyone who happens to pay attention, and it can not be measured, it probably does not exist independently of your experience. Moreover, individual perceptions of reality, even in cases of "consensus reality", do not alter the /actual/ nature of reality. Reality exists, independently of our perceptions of it, avoiding reality would yield nothing scientifically valuable.
Caution Wake Turbulence