Someone hasn’t been paying attention. The reason blind tests don’t mean anything WHEN THE RESULTS ARE NEGATIVE is because negative results can result from mistakes by the test conductor, mistakes in the system used for the test, and other reasons. POSITIVE RESULTS, on the other hand, tend to support the hypothesis under test, even if there were mistakes or errors in the test. You can ignore a single blind test if the results are negative. Follow? The other part of the puzzle is that when the differences are subtle or small it can be quite difficult if not impossible to correctly identify the better device. That’s the scam that Randy was running. And that you apparently go along with.