“Invoking ghosts” is a dysphemism for what is otherwise an honest epistemological stance. Given that our knowledge is limited, there is always an x that must serve as a the wildcard of our ignorance.
Thanks for increasing my vocabulary. Indeed, dysphemism seems prominent among the tools naturalists use to fend off reason.
What neutral term would you use for hypothetical entities that have no observable attributes, no specified capabilities or limitations, which do unspecified things at unspecified times and places for unspecified reasons, using unspecified tools and methods?