Quote Originally Posted by 300A
Agreed, assumptions are made that completely invalidate the tests.
Two points I would like to reply too.

1) Who decides which tests are valid and which aren't?

2) One can duplicate, over and over again, and get the same results each time as assumptions can lead people to the same conclusions, thus total inaccuracy.

For instance, how many times do you have the subjects listen to the same selection, and over what period of time. Over and over again certainly leads to the blending of the sound of the two different pieces of gear. You will always get the results of no difference. This happens visually too. Pretty close to black will be perceived as black if shown enough times. (This applies to any color, one the actual color and another that is close to that color.)

Another problem is if any comments are made, it could end up being deceitful. And in fact, deceit was directed toward the subjects, causing erroneous results. Crafts used one reference in which this occured.
It ain't you who decides. People in the know decide. The court of science decides. It has been decided, contrary to either of you claiming otherwise.
The value of DBT to determine audible differences is indisputable in the court of science. Period.
Your sighted home listeing for differences has no real meaning as it is unreliable, hence has no meaning. Not the same as what one enjoys or not.
Read some Journals in Acoustics, Psychology, psychoacoustics, you name it. DBT rules in reliability. That is a fact.