He wrote of it in his 1974 book, How to Live Like a King's Kid , and the news services spread it around. But he did not give the names of the computer scientists involved and none has ever been found. He did not produce any punch cards, programming notes, printouts or any other documentation. He did not attempt a repetition of the computer simulation. He did not say who he heard it from.
Extraordinary claims call for extraordinary evidence, and the burden of proof is on the claimant.
With the paucity of evidence in this case, the burden of proof is not met. In the absence of corroborating witnesses, documents, and repeatable computer simulations, this story becomes a mere parable or fable.