In fact Randi requires that his subjects pay the full cost of the test, Randi’s flight, Randi’s hotel bills, etc.
Actually, they have, quite often. The result is that what was once paranormal instantly becomes normal.
Hypnotism is an example of such. About 150 years ago it was classified as a psychic ability, and the Randis of the day denied that it even existed.
Meteorites are another example, paranormal 200 years ago, normal today.
Or, a more recent example, an example of crank medicine that was eventually proved true, considerElizabeth Kenny’s polio treatment
BTW, “rigorous skeptical scrutiny” often refuses to see the evidence under its nose. Antoine Lavoisier, expert scientist , discoverers of the thorory of combustion, and complete skeptic gave meteorites the old “rigorous skeptical scrutiny” and came to the conclusion that they were ordinary stones that had been struck by lightning. Just thought I’d point that out to you.
My suspicion is that science does not in fact currently know everything. I think it possible that some things that science ridicules today will turn out to be true after all. Then once proved, they will seem mundane and ordinary.
It is up to people making extrordinary claims to prove them. But Randi’s challenge is a poor way of testing them. I don’t think that any of the three examples I listed could have passed Randi’s challenge, had it been running then. Yet Skeptics would claim the mere existence of Randi’s test is evidence against them.
There may well be a thousand Uri Gellars for every Elizabeth Kenny, but Randi’s fault is that he lumps them all together. I am sure that, had he been active at the time, Randi would have been leading the attack on Kenny.
**
Its never been tried