Yes, but I expected to see (filter even . filter (< 5)) [1..4] given the specification and the lisp counterpart. I do not fully understand the lisp code,

Yes, but I expected to see (filter even . filter (< 5)) [1..4] given the specification and the lisp counterpart. I do not fully understand the lisp code, so I can't be sure what is a typo and what is an erroneous assumption from my part.