Between 1983 and 1987 thousands of people in new york saw a ufo in the sky. it was estimated to be between 200 and 1000 feet long and had multicolored blinking lights. the ufo sighting turned out to be a hoax. rather than an actual ufo sighting, what viewers actually saw was a group of small planes with multicolored lights attached. the pilots would fly in formation that gave the impression of a ufo. they were even able to make it appear as though the ufo disappeared by turning off their lights simultaneously. the interpretation of the sighting was influenced by the viewers' perceptual

Ascientist successfully predicts the outcome of an experiment. you watch carefully and know he didn't cheat. the scientist's success shows that: a) the scientist knows absolute truth about this experiment; success is not possible unless you know the truthb) the scientist was just lucky; no one ever knows what's going on, so successful predictions require luckc) the scientist may know the truth, or at least know something that is close to the truth, or the scientist may have gotten lucky this time; you can't be absolutely sured) the scientist really was cheating, even though you didn't see the cheating; no one can get things right, except by cheatinge) the scientist spent the night at a particular hotel chain and go a free breakfast, giving the scientist the ability to do amazing things