Everyday thousands of scientists around the globe perform experiments and observations of the natural realm. They note a certain condition, make (or allow) a change, then note the new condition. Many times, the same experiment or observation is conducted repeatedly to be certain the results of the first (second or third) were not just "flukes". Scientists combine many of these to come to conclusions about the natural realm. But what is it that allows these conclusions to hold any validity? They are based on experiments and observations, but what allows those to be trusted to reflect the natural realm?
Consistency In Nature
The entire scientific enterprise is based on one assumption: the natural realm is consistent. That means that in multiple instances when all conditions are the same, identical results will be produced. Experiments and observations are repeatable. You can be certain that if you perform the same experiment in the precise same way a second time, you will get the same results. If scientists were able to produce water from the combination of two hydrogen atoms with one oxygen atom in one experiment, then gold with the same ingredients in the second (then another substance third, and so on), they could conclude that this was not a consistent phenomena. Further, if scientists found that their experiments, when performed exactly the same way, produced different results without any consistency, they could conclude that the natural realm was not predictable, and investigation of it is futile.
