On Fri, 11 Apr 2014 15:56:25 -0400, nospam
wrote:

In article ,
wrote:

in double-blind tests, people consistently do no better than chance in.
they are *guessing*.

In guessing what?

they're guessing which is which, which means there's no difference.

They are probably guessing so there is probably no difference. If you
do a vaild statistical analysis, you can compute the "probability".