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Originally posted by kro32
Eye-witness testimony is not credible evidence on it's own sorry to say. Human percepetion is too easily manipulated by outside forces and this has been proven in many many court cases in regards to false identification.
Then, looking at the negative side, all of us who have checked cases are sometimes in near anguish at the typical inability of the scientifically untrained person to estimate angles, to even understand what you are asking for when you ask for an angular estimation. We are all aware of the gross errors in distances, heights, and speeds so estimated.
And I would emphasize to those who cite jury trial experience that the tendency for a group of witnesses to an accident to come in with quite different accounts, must not be overstressed here. Those witnesses don't come in from, say, a street corner accident and claim they saw a giraffe killed by a tiger. They talk about an accident. They are confused about details. There is legally confusing difference of timing and distance, and so on; but all are in agreement that it was an auto accident.
So also when you deal with multiple-witness cases in UFO sightings. There is an impressive core of consistency; everybody is talking about an object that has no wings, all of 10 people may say it was dome shaped or something like that, and then there are minor differences as to how big they thought it was, how far away, and so on. Those latter variations do pose a very real problem. It stands as a negative factor with respect to the anecdotal data, but it does not mean we are not dealing with real sightings of real objects.