> You evaluate the innermost (i.e. the tail) expression first, and work your way out to the head. As a sexpr it is a little more obvious that way: `(= a (= b (=

> You evaluate the innermost (i.e. the tail) expression first, and work your way out to the head. As a sexpr it is a little more obvious that way: `(= a (= b (= c 5)))` That's not true in Python though. a = b = c = <expression> is equivalent to: temp = <expression>; a = temp; b = temp; c = temp I don't know why that order of evaluation was chosen.