If you really want to geek out about it look here and read some of the journals they reference:
http://www.tastescience.com/abouttaste2.html
They also note this:
Quote:
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Finally, Small and her colleagues present strong evidence that the final common pathways of taste and smell go to the non-verbal right brain, which has implications for our ability to report thinking processes related to taste and smell; one of the reasons Titchener - and Wundt before him - only reported four tastes was probably that they had difficulty getting people to talk about taste and smell.
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So some people might not be able to explain flavors.