Do Pepsi and Coke (or Budweiser and Heineken) still taste the same once you know which is which?
Or only after you know which is which?
I think it’s undeniable that adding a visual element to any comparison is bound to influence the conclusions.
How could it not when sight is so closely related to memory and preconceptions?
Therefore I would argue that no sighted comparison can ever be called objective. Many experiments have also previously suggested as such.
A truly objective result is one that can be independently repeated time and time again.
This usually requires a carefully controlled environment and carefully calibrated measuring equipment targeted on precisely the specific quality you are seeking to measure.
Once you bring human beings and their impressions into the equation you have lost objectivity and are now lost in the realm of subjectivity bias.
Of course opinions and impressions can still be useful, but without evidence to back up those opinions and impressions, that’s the most they ever can be.
Whether we like it or not, we’re just not very good at measuring things with just our senses alone, are we?
I can practice all that I want, but I’ll never be more accurate at timing exactly what 2 minutes is than my watch is.
I agree with you in that it is true that there are degrees to subjectivity. This is the main reason, I suspect, why we tend to trust certain reviewers more than others.
Ultimately though, they’re all subjective of course.
I was recently reading about a particular model of Acoustic Energy loudspeakers and was surprised to find one reviewer calling them tonally warm and rich, and another who stated that he found them slightly dry.