I wrote: "(The assumption that ghosts don't and can't exist seems to be gratuitous and a-priori, just kind of slipped in as an article of pre-existing faith.) That's not the right way to pursue these arguments."
I disagree and submit the opposite is true.
If you are an atheist it is the right way to pursue truth about ghosts just as pursuing truth about gods.
You're confusing things without shining any light on them, W4U.
Else, you can accuse all atheists of argument from authority by assuming that a god cannot exist.
I raised two issues that you seem to be confusing.
1. The argument from authority. That seemed to be implicit in your phrase "...propositions by real theoretical scientists, such as Joe Nickel, PhD". Of course Joe Nickel isn't really a scientist at all, instead he's an activist. Nor is he a
theoretical scientist, that word just seems to be some sort of honorific. Finally, Nickel's PhD is in English literature, it isn't scientific training.
2. The problem of circular reasoning. That crops up when people address a question with their conclusion already in mind, then look for arguments and evidence that will support that preexisting conclusion. Religious people and atheists both typically do it when they address the question of God's existence. Ghost-believers like MR do it when they assume that what most of us would consider flimsy evidence is in fact conclusive evidence of the existence of ghosts. And self-styled "skeptics" do it when they approach purported hauntings with the intention of persuading others that they are bullshit. In fact, this kind of circular reasoning is exceedingly common in
most human thought. It's how people typically think.
But, IMO, that's not the way it works. Neither Atheists, nor Ghost-busters need prove a negative.
No, no, no, W4U. I'm not going there with you.
Anyone who asserts the truth of any proposition, and wants to convince somebody else to believe it who doesn't believe it already, has the burden of persuading that other person. (Otherwise he or she won't agree.) That's going to be true whether the proposition asserts the existence or non-existence of something. "Negatives" don't get a special 'Get Out of Epistemological Justification Free' card.
When physicist Ernst Mach questioned the literal existence of atoms, he wasn't absolved of having to argue for that idea or from the need to convince his peers, just because he was asserting atoms'
non-existence.