The scientific method is an iterative process of testing hypotheses. The default position on a subject is known as the null hypothesis, and new alternative hypotheses are posited and then tested to see if they better fit observations.
For example, it was once generally accepted by scientists and laymen alike that the Earth was flat. An alternative hypothesis was proposed that the Earth was actually [roughly] spherical and, through observation and testing, that alternative hypothesis supplanted the null hypothesis and showed it to be false. That’s how science works. If we had never been able to produce sufficient evidence and observation to falsify the null hypothesis that the Earth was flat, we would still believe it today.
This method has falsified many null hypotheses about our universe, including many that originated in the great world religions and many that just seem to be ‘common sense.’ The Judeo-Christian creation story, for example, has been pretty soundly falsified as a literal account (though that has no bearing on its value as a figurative or allegorical account). The common-sense assumption that time is a fixed constant has also been falsified, as we now understand (per the Theory of General Relativity) that time is relative and is subject to dilation and delay when affected by gravitational fields.
But there is one fundamental question—how was the universe created?—on which there is little or no observable evidence supporting any hypothesis. So on this topic, if we are to apply the scientific method in a proper and consistent way, the null hypothesis stands. Only when an alternative hypothesis is proposed and sufficient evidence and observation serves to falsify the null hypothesis can we ‘switch’ to an alternative.











