A fav. proof required of sceptics is to ask the same question numerous times and expect the same cards to turn up ... IMO this is like me asking to open the cat box at various times and show the same result ... the cat is always alive ... to prove the quantum theory.
I see your point. A requirement like the one you describe would be too narrow indeed. The whole world can change in an instant of course and what is true now isn't necessarily true in a minute's time.
So the crucial question is (and one that stays on topic of the thread): Is it possible to perform a an empirical experiment about tarot divination that is fair in both directions, for the skeptics and for the divine? And if so, how does it look like?
My major claim is that it is possible indeed to perform such a test. And I do have a proposal for a testing procedure. It is a proof of concept for testing one specific aspect of divination, namely the hypothesis that
something divine makes the drawing of tarot cards non-random and by doing so produces information that makes a tarot reading more accurate than with randomly drawn cards.
The procedure is a bit lengthy:
1. Many random numbers are collected. Either by using data that are based on physical processes like radioactive decay and that have been produced a long time before anybody started thinking about the experiment being conducted. Or by using a pseudo random number generator on a computer that uses the number 42 as a seed. Both methods make sure that all the random numbers that will be used during the experiment are determined before the experiment even starts. This avoids the possibility that the random number generating process is a device of divination itself. If tarot cards can be influenced by the divine then a set of dice or a computer could be influenced as well.
2. Many new tarot decks are provided that the people who will read tarot during the experiment have never seen before. They can ask for their favorite type of deck in advance though. This avoids unconscious cheating by readers who unconsciously know little scratches and wears on the backs of their own frequently used deck.
3. In each step of the experiment the tarot cards are ordered randomly according to the pre-collected random numbers. This is to avoid effects of a previously existing order of the cards.
4. Then the reader shuffles the cards and lays a spread with card backs up. The supervisor of the experiment has to make sure that the reader doesn’t see the fronts of the cards. This is to avoid the chance of cheating.
5. Next reader and querent leave the room and the supervisor does one of two things each with equal chances according to some pre-selected random numbers. The supervisor either picks up all the cards from the spread and puts them back in the same way as before. Or the supervisor picks up the cards of the spread and lays a different spread instead that is determined by more random numbers. This makes sure that the reader will have no chance to know if the actual reading will be done with the original spread or with a random one.
6. Reader and querent return to the room. The reader turns the front sides up and reads the cards.
7. The querent judges the accuracy of the reading by writing down a score like a number between 0 and 10. Why the querent finds a reading accurate, what criteria the querent has, whether the querent suffers from self-deception or not, all this doesn’t matter.
8. If the average score of tarot readings done with original spreads is significantly higher than the average score of tarot readings done with random spreads, then we may consider divination to be at work.