(scratchpad) : ( -- seq ) { 1 2 3 } ; (scratchpad) : ( -- seq ) { 4 5 6 } ; (scratchpad) seq-min . 1 (scratchpad) seq-min . 4 (scratchpad) { { 1 2 3 } { 4 5 6 } } [ seq-min ] map . { 1 4 } So far so good! But... (scratchpad) { } [ seq-min ] map "Generic word length does not define a method for the word class. Dispatching on object "