So like the claim of people being abducted by aliens? This claim is not approachable using the scientific method? Not so sure about that.
Not to any real conclusion, no, it's not. You can conclude that they weren't abducted by aliens, but you can't necessarily establish that they lied, or what actually did happen. You probably can't even conclude that they weren't abducted, in a few cases. Believing them is a matter of choice, application of the scientific method notwithstanding.
Case in point: I engaged in a ritual where I didn't eat, didn't drink water, and stood staring at the sky for four days. Sometime on the fourth day, I'm approached by a bear. I insist-and I do-that I had a conversation with the bear. I further assert that the bear was the universe/God's/"the force's/Foot's (sometimes I call God "foot," it's my way of making fun of Him) way of conveying a message to me-that I had a rather prolonged and meaningful conversation with "God."
The bear itself, at least, was not a hallucination, and was observed by another.
We can hypothesize :
1-It's as I say, the bear spoke to me with the voice of "God."
2-I was hallucinating.
3-I'm lying.
4- It's as I say, but the bear was just a talking bear messing with a dude's head.
5-It's as I say, but some other entity was speaking through the bear.
6-It was an escaped circus bear.
And so on, but we can't establish that any of them is correct, or the most likely. The only thing we can truly measure is that the bear was actually there, and behaved somewhat outside the ursine mean. While I can point to evidence that I am, in fact, quite sane-truly 100% government certified "sane" at the time, by virtue of my work assignment at the lab-there is also evidence that I am more than willing to play fast and loose with the truth from time to time. And, while the bear was, in fact, a real flesh and blood bear, there is no way to establish that what I perceived as a conversation was not in fact a hallucination-in spite of the bear's rather extraordinary behavior.
So, we can observe, but the only observations-besides Danny, who saw the bear and saw me talking with it-that have any real validity are mine. There are no measurements that can be taken, no experiments that can be undertaken, and very little testing or duplicability available. In short, all we're really left with is the ability to formulate and modify hypotheses, none of which is any more disprovable than any of the others.
On the other hand,
I participated in a ritual where I didn't eat, didn't drink water and stared at the sky for four days. On the third day, I was approached by a bear, and the bear and I had a conversation. I won't say what the bear said-it's private-but I can certainly say that it was all true,or has since proven to be true, just as I can say, by virtue of bear scat and prints, that it was a real, flesh and blood bear.
So, what "evidence" there is is purely subjective, experiential, and of no use to anyone but me, and, perhaps, those who
choose to believe me.