We have already gone through this discussion - blinded versus unblinded test. I initially found some validity to this objection when it was first raised, this is why we conducted some blinded tests together, at a time when I was receiving more help and interest from forum members. However, I found that these tests gave results of a somewhat inferior quality (because of the great complexity for participants), and so I don't see the point of trying to do this again. In the simple version of the test, that I now favor, people can "see the work" after the test, in the analysis, so I believe there is excellent security in the simple test already. Were I to declare that an obviously absurd answer is credible, you could very quickly and legitimately point this out. You may already have seen an example of this in my latest test.