If I were to ask you to predict which card would be chosen from 4 alternatives, chances are pretty good that you would be unable to correctly pinpoint which card would be selected. However, there is a reasonable chance that your body may have a physiological reaction which can then be used to predict which card would be chosen. The physiological reaction would occur anywhere up to 10 seconds before a conscious choice to select a card is made and the reaction is typically outside of conscious awareness. These cues are minimal physiological signals that are typically difficult to perceive.
In short something about you ‘knows’ but it is not the conscious mind. What may surprise people is just how prolific the scientific evidence there is for precognitive phenomena, particular the type which occurs outside of conscious awareness. I have provided a link below which I suggest people read and then follow up on the studies mentioned in the article.
There are many worthwhile questions people could ask in light of the scientific evidence. One of the questions I would be asking is if we can train ourselves to pick up on these minimal physiological cues. We do know that some biofeedback training can help greatly in this regard. I imagine hypnosis would also be highly amenable to this sort of training. Meditation would help greatly.
From my own personal experience, I would suggest that being able to quieten the mind helps greatly when we are trying to focus in on minimal cues. Too much thinking, too much head noise, too much emotion will get in the way of perceiving these cues.
I have long been of the view that when it comes to “knowing” in ways other than the conscious mind that the following rule set applies:
Cognitive based guesses or hunches will be correct about 25% of the time.
Emotional based, cues, guesses or hunches will be correct about 50% of the time.
Bodily based cues will be correct about 99.99999% of the time.
Where the latter is concerned it is often our interpretation which is in error as opposed to the signal itself.