This chapter argues that the familiar map of taste-receptor areas on the tongue given in various educational books is false, and explains errors concerning the theory of four tastes: salty, sweet, acid, and bitter. Human beings perceive various tastes differently. We only have to put a few drops of sapid solution on different parts of the tongue to see that the taste areas changes from person to person. When a fairly large number of people were invited to stick their tongues in a glass of sweetened water, only 40 percent of them sensed a sweet taste in the tip of the tongue. The chapter concludes that there needs to be a new vocabulary of taste that goes beyond the worn-out mantra “salty, sweet, sour, bitter,” which for many years now has been refuted both by personal experience and by sensory physiology.
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