Far from it, but our ears are not the only sense involved. I repeat, I'm not arguing for DBT in order to choose equipment. But the DBT-ers claim that the only way one can categorically say one is solely using one's ears to judge whether a difference exists, and nothing else, is to undergo an unsighted test. That seems to me to be unarguably true. I don't see how anyone can reasonably object to it.

-- Ian