SPEECH is so familiar a feature of 
daily life that we rarely pause to 
define it. It seems as natural to 
man as walking, and only less so 
than breathing. Yet it needs but 
a momentís reflection to convince 
us that this naturalness of speech 
is but an illusory feeling. The 
process of acquiring speech is, 
in sober fact, an utterly different 
sort of thing from the process of 
learning to walk. In the case of 
the latter function, culture, in 
other words, the traditional body 
of social usage, is not seriously 
brought into play.