Does anybody know what's in the future? I can guess, as can script writers, but when it comes to sci-fi, we only seem to be able to label the ones that were on target a long time later.
A Classic Scam
You obtain a mailing list of serious gamblers, divide it in half, and send one half the prediction that team A will win the championship next week, and the ocher half the prediction that team A will lose. A week later half your mailing list has received a true prediction from you-free of charge. Discard the other half of the mailing list; divide the remainder in half again, and send them a second brace of complementary predictions; this cuts down your pool of suckers, but now they have two "proofs" of your clairvoyance. After a few more "successes," you announce chat the free trial period is over; for your next prediction they will have to pay. And as Skinner would cell you, the beauty of the scheme is that one does not have co stick to such a rapidly diminishing group. Some people are suckers for "random schedules of reinforcement." Try offering a "discount" on the next prediction co chose for whom your success rate is slightly tarnished-say, one out of four predictions was false-and you will find many takers.
Daniel Dennett (1984) Free Will
Another Classic Scam
Create a genre of art that makes predictions about the future. Pick an aspect of reality and change it. Remove it. Alter it. Magnify it. Bop it. Insert movie man voice
"IN A WORLD..." The independent variable can be a social aspect (a world without privacy, a world without property), an aspect of nature (a world underwater, a world with low fertility), or a technological advancement (intelligent robots, we've cracked immortality) and there you go. Spitball commonsense results of ridiculously high, low, altered "X" (e.g., in a world with practical immortality but limited resources, time would become money) and BOOM, you've got a story. Make a lot of these films with an arrangement of tweaks on popular independent variables. By happenstance, some of these predictions will be correct in some interesting ways. The ways they get it wrong will be forgiven for not seeing the whole future and for allegorical hyperbole, and so on. The films that get it right will be praised as visionary achievements. Prolific science fiction authors who make a fair share of lucky guesses will be treated like a modern-day Nostrodamus and interviewers will ask these oracles to make more guesses in popular interviews.
There is a twist here, however, that the gambling scam does not enjoy. The story-teller is a reality creator. Popular fiction can create self-fulfilling prophecies ("Hey, it would be cool to have a hand-held TV screen!") and preframe evaluative judgements (we've already seen it a thousand times, so we judge reality by our inductions made from science fiction). Thus, you get to enjoy a bit the "not real communism" fallacy here. If your future has not arrived yet (e.g., warp drive), you can console yourself in the "knowledge" that this is simply a prophecy that has not yet come to pass (thus waiting for warp drive is like waiting for the second-coming of Christ).