Yazata:
A UFO is an unidentified flying object - something's in the sky and we don't know what it is.
Right. So there shouldn't be any dispute about whether ufos actually exist. They obviously do. Not everything in the sky is identified.
Presented with a UFO "sighting", I make no a priori assumptions about what it is. It remains unidentified until and unless somebody identifies it.
Probably most reports these days aren't ever conclusively identified. All that the debunkers ever seem to do is propose their own hypotheses about more mundane things that might conceivably be responsible. That's not entirely unjustified, as I discuss below in my comments about Hume on miracles.
It is faulty reasoning to assume that if we have an unexplained UFO, then it must be an alien spaceship.
I fully agree. So does MR in fact. He said as much in his post #5. All he got for his trouble was another flaming from the board's fundies. MR suggested that there might be something else at work here that we don't understand or perhaps even suspect. I agreed that's possible in my post #38.
One problem with pseudoscientists is that they constantly pretend to have knowledge they don't have.
Right. All ufo reports
have to be bullshit. They
have to be fake. They
can't be anything else. Our debunkers don't really know that's so, they are just assuming it on the basis of their faith in their own worldviews.
They don't appreciate that it is ok to say "I don't know (yet)."
Exactly. They don't even appreciate that the sightings themselves are a fascinating phenomenon, whatever their ultimate explanations might be. (Probably multiple explanations, some physical and some psychological.)
Some mysteries take time to solve. Some remain unsolved. That's ok. Sometimes we can't find enough information to solve a mystery. Sometimes there just isn't enough information available to find. But if we don't know something, that doesn't mean it's acceptable to jump to outlandish conclusions that "the paranormal" is somehow involved.
The sightings are extraordinary by their nature, they certainly aren't normal. Their abnormality is what got them noticed in the first place.
I agree that they aren't close to being sufficient evidence to pull down the entire scientific world-view.
But I'm not convinced that most ufo enthusiasts want to do that. That's how the ufo myth differs from earlier religious visitations in the skies. The ufo myth is expressed in sorta-"scientific" terms: spaceships! space aliens! It isn't Jesus, Mary and the Saints any more. I personally look at ufo belief as a species of contemporary popular religiosity that attempts to repackage the miraculous in what seem to be present-day terms that people today are more comfortable with and find more authoritative.
We'd need actual evidence to suggest any such conclusion.
I think that what the ufo myth fundamentally seeks to do is to re-inject a sense of magic and the miraculous back into everyday life, a necessary quality that people feel that mechanistic science and scientism has stolen from them. The idea that amazing, wonderful, transcendent and potentially life-changing things are happening around us that most people don't even suspect. (More recently the ufo myth has taken on dark political overtones as well, as it has started emphasizing government conspiracies and coverups. The emphasis sometimes shifts away from the manifestations of transcendence towards expressions of alienation.)
As I tried to point out to MR earlier, for many unsolved mysteries we only have a list of possible explanations, not certain ones. So, for a UFO sighting, alien spaceships is one possible explanation. But there are usually many other possible explanations (it was the planet Venus, it was reflected light from a terrestrial source, etc.) If we haven't ruled out the possibilities with confounding evidence, they remain possibilities.
I can't argue with that.
Extraordinary claims demand extraordinary evidence. To settle on the conclusion that a particular UFO is an alien spaceship we need very good evidence. Lacking that, it is far more likely, based on prior experience of such things, that the UFO has a mundane explanation (even if we don't know for sure what it is).
That sounds like a restatement of Hume's argument against miracles. But not quite. Hume defined 'miracle' as a violation of the natural order. Then he argued that since the natural order describes what is most likely to happen, any violation of that order is going to be unlikely by its nature. (That's why miracles are signs and wonders.) So... there will almost inevitably be some natural explanation possible for a supposed miracle that is more likely than it's actually being a violation of the natural order.
The difference in the case of ufos is that nobody seems to be suggesting that they are violations of the natural order. Aliens using advanced technology to visit earth doesn't directly contradict our understanding of science, let alone science as it might be conceived by a more advanced civilization.
I guess that I would agree with you that ufos being alien spaceships is an "extraordinary claim". But what does that mean? A claim with an intrinsically low probability? But do we really know that? How can we assign probabilities to things like visitations by space travelers? I'd personally say that my intuitive guess is that the probability is exceedingly low, given the distances involved and so on. (I'm also influenced by my argument regarding humanoid aliens.)
But having said that, remember that MR isn't exactly arguing that ufos are alien spaceships. He's suggested that they might be something totally unexpected. How does one assign probabilities to that? Arguably, the probability that something amazing will someday surprise humanity might be close to 1. It's just that the probability that contemporary ufo reports are that something is probably a lot lower.