The existence of "Ghosts" means...

[CristW]

OP, this can turn into a slippery slope real quick.
If ghosts, then lingering soul?
If soul, then maybe heaven and hell?

And since we know the bible is be, then all is bs.
Pretty sure it's not aliens (and I'm crazy star trek).
It's almost always those under duress, etc, who see these things.
You don't need to see something from your optic nerve to see something.
The brain is a very powerful tool and sometimes if you want to see something badly enough, you can and will. Also, I will hazard a guess and say that the vast majority who claim to have seen or felt a ghost are religious to start with. Therefore are biased to start with.

I forgot to mention. Just because there are "Ghosts" that does not necessarily means there is a Hell or heaven. What if another "religion" was expressing and saying something truthful like... reincarnation or that afterlife is without hell?

I just wanted to make sure the argument covers all possibilities.

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My reasoning does not lead to the FINAL conclusion that there is a creator. A believing "theist" does not create an argument for the DOUBT of a creator. Only an agnostic or an atheist creates the doubt for a creator.

A person does not have to believe there is a creator to be a theist. A theist, by definition, believes in one or more gods. That's it. Just as with the term 'atheist', you are not entitled to draw any other inferences about that person's beliefs or lack thereof.

Ok, I should have said...creator(s). Big deal. But thanks for the definition even though I already knew it because it is INFERED in my previous post!