the burden of proof is necessary for every claim.This is the null hypothesis. The burden of proof isn't with the person who says "data is data and a $500 cable won't change that". The burden of proof is with the person who claims their $500 cable will make your system sound better.
avoid wasting time and words if you are not prepared.
learn to measure everything if you want to make comparisons, if you are not able to measure shut up