The other day, Akemi went to the St. Lawrence Market.  There, she engaged one of the seafood purveyors in conversation.  The conversation went something like this: "Do you have social crab?"asked Akemi. "What?"asked the woman at the counter. "Do you have social crab?" "Social crab?" "Yes." "No." "Oh." "Do you mean soft-shelled crab?" "Yes!" "No."…