Editing Project Blue Book Special Report No. 14 (section)

==Key Findings==
The report reached several notable conclusions:
*Of the cases analyzed, approximately '''22%''' were classified as Unknown (unidentifiable).
*A '''statistically significant''' difference existed between Unknown cases and identified cases across several observable characteristics — indicating that the Unknowns were not simply identified cases with missing data, but a genuinely distinct category of observation.
*The most reliable and experienced observers reported a higher proportion of Unknown cases, not a lower one — contrary to what would be expected if UFO reports were primarily the result of misidentification by inexperienced observers.
*The study found no single conventional explanation that accounted for all or most Unknown cases.