THE UFO BRIEFING
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TERMINOLOGY OF UFOs
The frequently used term "Close Encounters" was coined by the late Dr. J. Alan Hynek as part of a terminology designed to categorize different types of UFO experiences. There are six main categories:
CE-I (Close Encounter of the First
Kind) to denote a close observation.
CE-II (Close Encounter of the Second
Kind) to denote cases where physical evidence is left by the UFO, i.e.
ground traces, electromagnetic effects on motors, physiological
CE-III (Close Encounter of the Third Kind) to denote cases where occupants are reported in addition to the object.
Researchers have recently expanded this terminology to include CE-IV for alleged abductions.
UFO BRIEFING DOC - TABLE OF CONTENTS