Trajanus
Paranormal Adept
Carl Sagan was involved on both sides of the The UFO debate. During the 1950s, at the onset of the modern era in ufology, he defended the idea that some UFOs could be extraterrestrial visitors.
In 1966, he was a member of the O'Brien Committee, also known as the USAF Scientific Advisory Board Ad Hoc Committee to Review Project Blue Book.
Later Sagan would become a prominent member of CSICOP, and the group would triumphantly espouse him as their own particular brand of convert. But even as a member of CSICOP, Sagan always came across as "the good cop", and his manner of delivery always suggested that he appreciated the spirit of genuine ufology.
Didn't seem that way to me. I thought it strange that he considered the old "oannes" half-fish tale to be evidence of ET but was hostile to the Hill story among others.