Alien abduction is a phenomenon that many have claimed to have experienced. People who claim to have experienced this phenomenon described the aliens as short with grays skin, frail bodies, large heads with large black eyes, no fur or hair and no visible genitalia. They say that they aliens take them into their crafts, experiment on them and even molest them
Most people who claim to have been abducted by aliens sincerely believe they have been abducted by aliens and they are not crazy, nor stupid.
But if they are not crazy or lying then does that mean the experiences are real? Not necessarily. We must look at alien abduction phenomenon the same way we look at all extraordinary claims; with a skeptical eye.
The thing we need to ask for is evidence but before that; somethings we must keep in mind. When talking about evidence we need to keep Occam's Razor in mind. What is Occam's Razer? "Pluralitas non est ponenda sine neccesitate" or "plurality should not be posited without necessity."
in plain english: "all things being equal the possibility with the requires the fewest assumptions and fewest entities is most likely correct." We must also keep in mind what constitutes evidence; anecdotes are not evidence, a story is not enough to be considered evidence even if you believe everything you are saying. What is needed is hard physical evidence, something that can be examined, tested and objectively verified.
It is at this point we run into a huge wall: the lack of physical evidence and what evidence is given can not pass Occam's Razor. Does that mean alien abductions are not real? A lack of evidence is not evidence of absence however a lack of evidence when there should be evidence is. Maybe these aliens are very smart and are very good at hiding evidence? That renders the claims unfalsifiable and thus no better than claims that we live in the Matrix.
There is more than the lack of evidence that throws doubts on alien abduction claims.