In preparing an argument, one of the things I like to do is to turn the argument around, just to see where it leads. So in that spirit I have the following question: Let's assume the moon landing as a hoax was the widely accepted theory. What would prove that the moon landing hoax was a hoax?

As an example, the dust kicked up when the astronauts supposedly walked (sic) moves in perfect parabolas, no dust clouds just perfect projectile motion. This could only occur in a vacuum. We could not create required vacuum on a stage even with today's technology. Neither could this have movie trickery. Using current technology we could fake this with CGI, but the computers in 1969 were not powerful enough to do this. Hence, we are forced to the conclusion that our hoax was hoax.

Any others?

(Reductio ad absurdum, baby!)