Why are some Racket functions such a 'member' not designed as booleans? I would expect 'member' to be a boolean. I am inclined to write my own version of 'member' that is boolean. Before I do, I am wondering if the bright person who designed the Racket function: 'member', did so for some very good reason that is not obvious to me. I notice that there are a number of other Racket functions like this, where they return #t or the value of the argument passed to the function, not #t or #f. I am just looking for the concept so that I might be convinced that I should use the racket function as it is, rather than writing a boolean version. Thanks