;; Little example using the backward chainer to test the modus ponens rule
(Predicate "P" (stv 1 1))
(Implication (stv 1 1)
(Predicate "P")
(Predicate "Q"))
(Implication (stv 1 1)
(Predicate "Q")
(Predicate "R"))
(Implication (stv 1 1)
(Predicate "R")
(Predicate "S"))
(Implication (stv 1 1)
(Predicate "S")
(Predicate "T"))