Another aspect of this whole question involves probabilities.
In some cases there is simply no data upon which to estimate probabilities, but in many cases there is something, some amount of data, to work with.
As we've been discussing Yeti or Sasquatch, I'll use that as a starting point.
If there were a lot of Squatches out there, a lot of people would have seen them, and some people would have found footprints, and at least one person would have drug back some bones.
My major professor all through graduate school was about the only academic who studied Squatch, and I saw a lot of the evidence he had gathered and accompanied him on trips to see amateur movies, etc.
If you put all of this information together you can guess at a probability that there is a large primate (other than man) wandering around the forests of the western US.
None of the movies I saw, including the famous Patterson film, are conclusive. The still photographs are even less so. The footprints are curious--something made them, those that aren't obvious fakes. And the handprint from NE Washington shows dermal ridges!
On the other hand, where are the bones? While carnivore bones are very hard to find in the wild, not a single bone that could be attributed to Squatch has ever been found.
All-in-all I'd put the probability that there is a population of Squatches running around the western US at a very low level. We could argue about the probability -- 5%, 1%, or whatever, but for the purposes of this discussion we can bring some information to bear on the problem.
Our choices are not always limited to 1) close-minded skepticism, 2) open-minded skepticism, or 3) open-minded acceptance as suggested above. Sometimes we can bring some evidence to bear and estimate or guess at probabilities.
(And yes, those puns were intended!)
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.
Belief gets in the way of learning--Robert A. Heinlein
How can I possibly put a new idea into your heads, if I do not first remove your delusions?--Robert A. Heinlein
It's not what we don't know that hurts, it's what we know that ain't so--Will Rogers
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