That's funny. To claim the CEO of.a diesel-producing company is refusing to show evidence that he can sell diesel fuel for crude prices or better would be almost as silly as accusing the CEO of a gold-mining company of refusing to show evidence that they can sell gold for copper prices or better.
Your entire original thesis on this matter was your false belief that no other P2O companies have been able to sell their product as crude oil or fuel, but the reality is that many of them have despite having a black slurry sludge product that is far inferior to diesel fuel.
Nobody is demanding John prove that there's a market for diesel fuel because it would be a stupid demand.