It’s a joke about the Knights of the Lambda Calculus, itself a Sussman joke on things like the Knights of Malta or the Knights of Columbus. Even in the SICP da

It’s a joke about the Knights of the Lambda Calculus, itself a Sussman joke on things like the Knights of Malta or the Knights of Columbus. Even in the SICP days of 6.001 not everyone outside MIT AI & LCS considered lisp or the lambda calculus relevant to the “real world”, whatever that is.