But modern physicists now say, I have done this experiment n times and can claim with 6 sigmas of certainty this is how the universe works. We are able to quant

But modern physicists now say, I have done this experiment n times and can claim with 6 sigmas of certainty this is how the universe works. We are able to quantify noise in our signals, and sure, the end result is that nothing is 100% certain, but we still tease out causalities from the patterns in our noisy world. Uncertainty in measurement doesn't prevent us from observing causality.