Mark Noah wrote:post by Mark Lipton
"So, how far do I need to run before I can reasonably claim that a marathon is a grueling event?"
Not the same thing. But I'll "run" with it. Suggesting a runner is in good shape, is ready physically for the run, the only other consideration is his/her mental ability to finish such a race well.
Are you sure? Don't the temperature at race day, the terrain of the course and possibly other extraneous factors also enter into it? That may seem gratuitous to our discussion, but do read on:
Relating this to your example, suggest here the taster is able to taste, is able to lift a glass to his face several hundred times, and all that's left is to stay mentally focused. I'm in no way saying it's not tough, but it happens. Are they ignorant? I don't think so.
So here is my real point: Dale may not have tasted 200+ wines in a day, but he -- like most of us -- is personally familiar with the phenomenon of palate fatigue, both in himself and others. What he engaged in is extrapolation from known data, a tried and true approach to the understanding of phenomena outside our range of experience. He now has also provided citations backing up his claims, which I hope you'll agree does bolster his argument a bit.
In your analysis, you totally ignore a critical component of tasting, your sensory apparatus. There is a well-known physiological phenomenon known as habituation that is observed when any of your sensory organs is repeatedly exposed to a stimulus. (It has to do with the down-regulation of G-protein coupled receptors in neurons, but that's probably TMI

) A classic example of olfactory habituation occurs when we're exposed to the rotten egg smell of hydrogen sulfide, a gas that is every bit as toxic as hydrogen cyanide. Fortunately for us, its smell is so pungent that we detect it at levels well below the toxic threshold (impressive, given how toxic it is) but we lose our sensitivity to it after being exposed to it for a while, so people do die of H2S exposure when the amount of it in the air is gradually increased to eventually reach a toxic level.
In the case of wine, even if we spit our olfactory nerves are getting repeatedly hit with smells and that will lead to desensitization over time. Alcohol also works its particular form of magic, even when we spit. So the only real question is at what point our tasting is significantly compromised. Is it 20, 50, 100, or more wines? That question I leave to researchers who've actually studied it, but I have no problem whatsoever believing Dale's assertion.
Mark Lipton