On 24/07/2010, aditya siram <aditya.siram at gmail.com> wrote: > Perhaps I'm being unclear again. All I was trying to say was that: > liftM2 (-) [0,1] [2,3] /= liftM2 (-) [2,3] [0,1] > > -deech I'm sorry if I'm bumping an old thread, but why should "liftM2 f" be commutative when "f" isn't? (I hope I'm not responding incorrectly)