To more fully illustrate the need for a single theory of culture and language, indeed all human behaviour, one might contemplate a scene like the following. Two men are watching other men move some heavy furniture down the stairs in their apartment building. One man passing on the stairway landing is huffing and puffing and concentrating solely on his heavy load. His wallet is hanging loosely from his back pocket, about to fall out. He clearly wouldn’t notice if someone relieved him of this burden. The first observer looks at the second observer with raised eyebrows, looking at the wallet. The
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