Gary C
Senior Member.
That actually supports my point.
"Dark matter" refers to observed/inferred gravitational effects; a new particle is one unconfirmed explanation.
Yet nobody says dark matter particles are "Santa Claus" just because they have not been proved.
"not proven" does not mean "epistemically equivalent to Santa Claus."
In the same way some serious investigators, after looking at cases and associated data, have concluded that while extraterrestrial visitation is not proven, some cases are puzzling enough to justify scientific study.
Still no.
In the first case the demonstrated physical effect is real to the limits of our ability to make relevant measurements. Several proposed solutions have been ruled out based on experimentally or observationally collected evidence.
In the second case there are no unknowns. The cultural antecedents in Northern European folklore and religious practices are well known and firmly documented. The first use of the actual term "Santa Claus" is known. The cultural norms surrounding parental use of the trope have been thoroughly examined both popularly and professionally in the sociological and psychological literature.
If you are saying that people who think UFOs are some form of NHI cannot or will not admit to this distinction, then we agree.