To the heterogeneous data provided by these eighty-one cases, the committee attempted to apply the precise tools of logic and mathematics in order to establish a correlation between UFOs and electromagnetic effects, and concluded that a cause-and-effect relationship probably did exist. With suitable material, statistical methods can suggest a correlation between any two sets of facts and can estimate the probability that the correlation is significant and not due to chance. No competent statistician, however, would try to apply the methods to such amorphous and uncertain data as those used by the committee. More than a third of the incidents cited come from newspaper accounts or the private files of saucer organizations in foreign countries. All leave many unanswered questions. At least two involve fully identified objects: the great fireball of September 18, 1954 (p. 92), and the three fireballs of April 6, 1955, may well have caused some radio interference but they were not UFOs. Even with the well-reported cases, a conscientious historian would find it nearly impossible to determine precisely what the witnesses saw, what they heard, what they did, and what they said. The various printed accounts of the Levelland incidents, for example, vary in many details. The events took place in an atmosphere of excitement and the stories inevitably changed slightly with each retelling. The reports of Air Force investigators, records in the files of civilian saucer organizations, statements in newspapers, magazines, and books--no two give exactly the same version of any given incident. Although the points of disagreement are often trivial, they are sometimes vital to finding the correct explanation. Even if, for the sake of argument, a statistician were willing to accept the evidence of the eighty-one cases at face value, he would still not attempt to establish a correlation between UFOs and E-M effects. The probability that a (postulated) UFO will appear at a given time or place is unknown; the probability that an electrical appliance will fail to work at a given time or place is equally unknown. Hence the probability that the two phenomena will occur together at a given time and place is a concept that has no meaning. _Effects and Causes_ Asked to explain what caused the failures of engines, radios, watches, etc. reported during the week of the Levelland sightings, any high school physics student who answered, “Some new kind of electromagnetic force” would properly receive a grade of zero. Admittedly there are physical phenomena that the scientist does not yet understand, but he does know that electrical and magnetic forces do not and can not perform all the feats attributed to them by saucer enthusiasts.