Double blind tests are only part of the argument, of course. Starting point is that there is no existing physical theory that can explain such 'night and day' differences. The next part of the procedure is to look at measurements. Since these do not show anything of potential significance either, the listening test is the last part. Here, expectation bias is an amply documented problem, hence the preference for double blind. It is true expectation bias is only one of many potential issues, and it is of course true that there are many ways to mess up a test procedure/be dishonest. However, there is ample opportunity for those who believe that there is a difference, to do their own tests, document their methodology and demonstrate that there is difference.
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- 141 posts total