Sometimes there is hard evidence. Contrast that to Astronomy, and limit the data source to just stars, what physical evidence do you have other than light spectra? Not much. This not to say that astronomy is bunk, it certainly isn't, but if that science can be supported by optics and radar, but not chunks of stars of bits of extrasolar planets, it isn't unreasonable to consider the reality of UFO's. Ufology has photographic data, spectra, soil evidence, physical adjuncts manifested in materials and sometimes people after encounters, and of course the anecdotal evidence - it really isn't a narrow base of evidence on which the study rests.
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Excellent paragraph.
Won't sway many 'true UNbelievers' but we knew that. They have this addiction to TYPE II errors that they have a Death Grip on.
OK.
I'll bite.
What is a TYPE II error?