Question about "faith"

[John 6IX Breezy]

A scientist doesn't come up with ghosts, demons, fairies, leprechauns, or other anthropomorphic imaginings to explain nature.  Because its never worked, ever, and is usually defined in a way that can't be falsified.  It is a bad probability bet.

I think it's important to remember that, although ghosts aren't theorized by scientists, there are plenty ghost-like conjectures in science. For example, in the early days of neuron research, Cajal argued for the existence of dendritic spines, even though it was almost universally rejected as an artefact of staining techniques. He stood by his argument, and only with future developments in staining could the opposing artefact conjecture be falsified in support of the dendritic spines.