First I am sorry if I am way off the topic.. I think my comment is related but if you find it useless, my deepest apologies..
I am very interested in quantum mechanics and interference of energies and how free moving particles in the space, million miles from each other can effect each other's disposition and energies without direct interference.. and I guess its how a reading works.. by picking up on energies..
Now there is a theory which can be easily related to tarot, and that is for any given events there are many possibilities for outcome in the probability space.. at any given time when a reading is done, the reader is picking up on certain energies, and because there are more than one possibilities and also there are 78 tarot cards, using some mathematical calculations involving permutation and factorials, there are also many combinations of the tarot cards that can fit into any possible outcomes within the probability space.. so the reader has a choice of many combinations of cards to predict something that is likely to happen.. ie there is a certain probability of it happening.. Now here is an interesting thing that can happen, andit is that whenever a reading is done and one of the many possible outcomes is presented to the sitter, the energies within the possibility space for that particular events shifts.. and sometimes the reading changes the energies connected to a certain event.. every time the space for that particular event is looked at, ie focused on, it changes certain energies connected to that event, and that is why, sometimes the energies floating around a subject vary reading to reading.. that is not to say each of these readings were wrong.. its just that the energies shift as quantum mechanics states that dis- connected entities can effect each other in terms of the vibrations, and also because there are so many different combinations and permutations of possible outcomes that can match with many different combinations of the cards, any given reading at any particular moment in time could be correct, even though things can change as result of a second reading or generally the sub conscience mind of the sitter and the actions that follows as a result, even when they may not be so aware of their slight change of behaviour..
Th point I am trying to make in long is that, getting multiple readings sometimes is re-assuring, and I am guilty of doing it many times, but also we have to bear in mind that there is not only one possible outcome in the probability space and we also have many combinations of the cards that can be accurate for all the existing possibilities..
and as side note that is why although I use tarot to predict certain outcomes alot, but my preferred method of using it would be to ask for advice as to how to tap into the right energies to create my desired outcome from all the possible outcomes for that event in the probability space
I hope my comment is relevant ..
xx