I can't say but the purpose of the blinding tastings is for wine scientists exploring the human olfactory system on things like identifying the compounds of a wine's aroma.
Well there used to be a recognized system that people thought was concrete surrounding wine testing.  But recently scientists have been exploring the objective parameters of the human olfactory system.
Is it true Wine tasting is a delicate art? I'm unaware if it is or not, but there have been scientific blinding wine tastings that contradict wine tasting reliability. What do you mean by reliability?
More recently wine scientists (physiologists, psychologists, food chemists and others) have used blinded tastings to explore the objective parameters of the human olfactory system as they apply to the ability of wine drinkers (both wine professionals and ordinary consumers) to identify and characterize the extraordinary variety of compounds that contribute to a wine’s aroma.