I get a bit frustrated by the die-hard sceptics. I appreciate that, on the whole, a call for evidence is a good thing.
But there are complicating factors with the so-called 'supernatural'.
Firstly, it seems logical to me that, if there is a spiritual realm/an after-life etc, then it's way beyond what our brains can compute. Trying to stuff it into a test tube ain't going to work. Being human would be a very different (and poorer) experience if we KNEW there was a new world waiting. If (again, I'm only saying 'if') there were a spiritual realm, we would, surely, be actively prevented from knowing of it in proper, scientific terms? We couldn't cope with it!
So I see all the demands for scientific evidence as quite bizarre for that reason.
Secondly, most of the evidence people do offer is the odd encounter here and there. It's simply not possible to verify that sort of thing. Jeez, I have enough trouble trying to verify which of my children is lying when they've just had a falling out. Life is a series of moments, not a laboratory.
I'm not saying that I definitely think there are ghosts; I'm just explaining my difficulty with the confidence of those who state "There is no such thing as the supernatural." I mean, as pp have mentioned, doesn't it rather come down to definitions?
Generally, sceptics say they accept that there may be things in the world science is yet to understand. But they are not actually accepting that if the "things we don't yet know/may never know" have to adhere to already understood rules and concepts.
Take the "group halllucinations" phenomenon. It seems that sometimes more than one person sees the same unexplained figure/event. Sceptics will say they all imagined it. Ok. But do we currently have a scientific way of explaining that? What I'm saying is, even if you're adamant that the "ghost" isn't there, doesn't the "group hallucination" concept itself require an explanation that contravenes the currently accepted ideas about how consciousness works? At what point do you concede that what you previously dimissed as supernatural and therefore bollocks is starting to become a new scientific theory? (I'm speculating a bit here, obviously, but just trying to push the idea that new concepts can destroy our convictions).
I don't think the "Huh, bet you believe in the tooth fairy too" comments are clever or logical.
The people who've shared their experiences have generally been quite open-minded, and have often simply said that they can't see a logical explanation for their experience. That's almost the very opposite of nailing it down to a specfic, fabricated storybook creature.