Since the other examples have Haskell equivalents, I believe the variable duplicating combinator is `join` in Haskell, but I'm not near ghci to test. I go back

Since the other examples have Haskell equivalents, I believe the variable duplicating combinator is `join` in Haskell, but I'm not near ghci to test. I go back and forth on how useful these sorts of combinators are. I do appreciate how they at least have to be explicitly declared in Haskell, as opposed to verb trains in J. But I've still gotten complaints from teammates about what the fuck `liftM2 . liftM2` is supposed to mean.