The Giant Pacific Octopus wrote:

You know Merian C Cooper directed the special effects in King Kong. He told Samuel Peeples that the Spider Pit was never filmed, and then said to Jack Polito it was filmed. So even directors can backpedal.

I can relate to this.
WESTWORLD is one of my favorite films since childhood, and I got a chance to talk to its writer/director Michael Crichton on a Larry King radio talk show in 1990.  I had always recalled seeing a sequence on TV when the movie first aired around 1976, and back then I'd recorded it on my audio tape recorder ... it was a cut sequence in Medieval World where a terrified guest was tortured on a rack. That scene was cut from the theatrical versions and has never been seen again ever since that original TV broadcast, to the best of my knowledge.

But anyway - when I asked Mr. Crichton if there had been any scenes which were filmed but later edited out, he said "No, there weren't any sequences filmed that were cut, but there were scenes written which were never filmed"   (and he proceeded to tell me about a written subplot regarding Japanese investors who were interested in investing in the Westworld resort).

Anyway - I didn't get the chance to specifically ask about the TV sequence I'd seen and recorded, because I was cut for time. Perhaps Crichton just got absent-minded and forgot about the Medieval rack scene, but it just goes to show you can't always take directors at their word, for whatever the reason.