You know I don't have/can't produce that data, then OK you'll probably tell me, "I told you all of those centralized mixers/tumblers don't mix/tumble outputs". But I'll also ask you, "OK, do you have verifiable data so we can validate that claim and make everyone shut up"? You'll think, then you'll tell me that the burden of proof is on me because I ask for the data?
The burden of proof is on you because you are the one making the claim.
What claim am I making? Because I'm simply taking a stance that an entity is innocent unless proven guilty? OK, let's pretend I AM saying that an existing mixer today is actually doing its job, the discussion will be described the same as that post of mine that you have quoted.
It will be me, who can't provide evidence to prove their innocence BECAUSE you already judged them as guilty, but if I ask you to show verifiable data to prove that they are guilty, you can't provide it either.