Michael Perkins

Jonah Lehrer discusses how easily the sensory impressions of wine experts can be influenced by false beliefs about the wine. He describes two interesting studies:

In 2001, Frederic Brochet, of the University of Bordeaux, conducted two separate and very mischievous experiments. In the first test, Brochet invited 57 wine experts and asked them to give their impressions of what looked like two glasses of red and white wine. The wines were actually the same white wine, one of which had been tinted red with food coloring. But that didn't stop the experts from describing the "red" wine in language typically used to describe red wines. One expert praised its "jamminess," while another enjoyed its "crushed red fruit." Not a single one noticed it was actually a white wine.

The second test Brochet conducted was even more damning. He took a middling Bordeaux and served it in two different bottles. One bottle was a fancy grand-cru. The other bottle was an ordinary vin du table. Despite the fact that they were actually being served the exact same wine, the experts gave the differently labeled bottles nearly opposite ratings. The grand cru was "agreeable, woody, complex, balanced and rounded," while the vin du table was "weak, short, light, flat and faulty". Forty experts said the wine with the fancy label was worth drinking, while only 12 said the cheap wine was."

Lehrer draws the following conclusion:

"When we taste a wine, we aren't simply tasting the wine. This is because what we experience is not what we sense. Rather, experience is what happens when our senses are interpreted by our subjective brain, which brings to the moment its entire library of personal memories and idiosyncratic desires. As the philosopher Donald Davidson argued, it is ultimately impossible to distinguish between a subjective contribution to knowledge that comes from our selves (what he calls our "scheme") and an objective contribution that comes from the outside world ("the content"). Instead, in Davidson's influential epistemology, the "organizing system and something waiting to be organized" are hopelessly interdependent." (emphasis mine)

I'm not sure that this is exactly what Donald Davidson had in mind, but the point is still interesting.  For more on wine experts, click here for an interesting WSJ article by Leonard Mlodinow.