Lambda is a very complicated thing, with extremely twisted name substitution rules. A minimal system needs only one combinator - http://en.wikipedia.org/wiki/Io

Lambda is a very complicated thing, with extremely twisted name substitution rules. A minimal system needs only one combinator - http://en.wikipedia.org/wiki/Iota_and_Jot http://en.wikipedia.org/wiki/Iota_and_Jot