In terms of human behavior, by demonstrating what is not the cause, we get progressively closer to knowing what is the cause. Some of you may still be curious about my rule for the sets of numbers any three numbers are acceptable as long as no number exceeds 25. Even if you guessed the rule, you still could not be absolutely certain you are right. You could never be sure that you have tested all the possible alternative rules. The only way we can know the rules for certain is to be told the rules by whoever created them.
Nobody knows the laws of nature, except for the creator of nature.
So far, our creator has not given us the rules. However, after eliminating countless hypotheses, we have a good idea of some rules in some areas.