You misunderstand. How can you quantify it? You just stated research states that such estimates are unreliable. How reliable/unreliable are they? 50%, 100%, 25%, 200%? That is what I mean by "quantified". The margin for error is unknown and you can't determine it because it changes with each person.
No, we can quantify the perceptual and cognitive factors that lead to perceptual error and make an accounting of those factors when assessing UFO reports. I provided the example of someone reporting size against a background of a clear blue sky – in such a report we could not rely on the size being accurate and could not therefore base any conclusions on (or about) the size. Other perceptual and cognitive factors can similarly be accounted for. The reliability of reports can be assessed by such an accounting.
BTW, are you now stating that the estimates made of distance, size, speed at Rogue river are "unreliable" because they were made of an unknown object in a clear sky? If not, perhaps you can describe how you quantified their reliability using this documentation to support your claim.
In that case there were multiple eyewitnesses and the object was moving toward, across and away from their fields of vision. Two of the witnesses also utilised binoculars. We also know the power of those binoculars and the type of details that were able to be discerned (wrinkled, dirty skin for example). The size estimates did vary between the witnesses (telling us they did not collaborate on their reports – a valuable observation in itself) – but they also has reference to the terrain surrounding them… and their size estimates, while at variance with each other, were within a set range (approx. 25-60 feet). We therefore know a range of size/distance/speed calculations – if it was smaller than their estimates it must have been much closer than they estimated (and therefore could not have been a blimp for example), if however it was larger than estimated, it must have been further away and therefore much faster than estimated (thus also not a blimp)… thus you see how we can use the sighting reports – including potential inaccuracies - to draw certain particular conclusions? (given also the object, according to all witnesses, was circular – like a coin of pancake – and given that it first came toward them turned across their field of vision and then headed at an angle away from them, we can take that shape as reliable - then that also rules out a blimp - as does no noise, no protuberances, etc). So sure there can be errors, but we make an accounting of them in assessing the sighting.
You can keep calling me a liar but that kind of comment reflects more on you than me.
I cannot remember me ever calling you a liar AstroP – it was a common turn of phrase used in such situations concerning the veracity of your statement – nothing more, nothing less. It is however well known that guilt can alter people’s perceptions of others comments in that way in such circumstances though
You have yet to present these documents and how you use them to quantify and verify witness perception/misperception. You say it as if it were true but I have yet to see you demonstrate it in practice.
You can obtain the basic factors involved in perceptual influences from any psychology 101 course and you can obtain the cognitive heuristics and biases from papers by authors such as Kahneman or Tversky. Those would be good places to begin your research into the topic.
I also keep providing you examples of it working in practice – perhaps you are simply ignoring those examples?
Because witness reports can be wrong, we need to establish the truth of their claims through other evidence in order to accept their claims (especially the extraordinary ones).
Just because eyewitnesses
can be mistaken, does not mean they
are mistaken in a given instance. In any given instance we can assess the perceptual and cognitive factors involved for reliability. We can of course also assess reliability, as you suggest, by looking for lines of converging or independently corroborating evidence.
By merely showing that a witness report is not wrong because of some previously-understood methods by with a witness report is wrong does not show that it is correct, because there could be other, unknown or unimagined ways in which the witness report is wrong.
First, I think you better revise the logic of your statement there Paul – I understand your meaning, but as you have written it, it makes no logical sense.
Second, we cannot state categorically that a witnesses is “right or wrong”, all we can do is assess whether they are more or less reliable in their observations. The more reliable, the greater the weight we place on the evidence (and vice versa of course).
Third, you make an appeal to the argument from ignorance. A fallacy in other words. You cannot say a witness is mistaken because of some unimaginable factor…
Eyewitness testimony is one of the poorest types of evidence. Our minds are so subject to bias, inattention, etc., etc., etc. How do you think people were talked into mistakenly remembering that their parents had raped them repeatedly in their youth?
…and what about all the poor souls who remember that correctly. Do you dismiss their trauma, hurt and pain merely because it is
possible that they are mistaken? Come on Paul…
Physical evidence, on the other hand, can be repeatedly examined by multiple independent observers, and when they come to a consensus, that leads to a stronger conclusion that eyewitness testimony.
Sure, but just because you personally cannot see how we might assess eyewitness reports for reliability, does not mean that it cannot be done.
In essence, what you are saying is that you require absolute proof in the form of physical evidence (an alien spaceship on the Whitehouse lawn I believe is the typical example) before you will “believe”. That is of course your prerogative … However, my contention is that there are UFO reports that simply defy mundane explanation. I am proposing no explanation for those reports, merely noting their existence. Whatever explanations
you put on them is up to you. You seem to be assuming the ET explanation, but I have continually pointed out that we do not have any direct evidence for it.
So, sorry if this covered somewhere else, but I just read an interesting article on how the Jerusalem UFO was faked.
Presenting examples of hoaxes will not change the fact that just because it is
possible for reports to be hoaxed, does not mean that
all cases are hoaxed. We all know hoaxes occur – that is a given – but that does not make every case a hoax – it would be a nonsense to propose such a thing. Besides the official studies that have been conducted (by the USAF, Hynek and Hendry for example) have the hoax/delusion category at about 1-2% of all reports. That is relatively insignificant.
Of course in the modern internet age we do fall victim to representativeness biases – that is we tend to over-estimate the actual incidence because of the visibility of those instances.