---- CR(R cup S)
---- [Klein and Hirokawa, 2012]
R:
W(B(x)) -> W(x)
B(I(x)) -> J(x)
W(I(x)) -> W(J(x))
S:

CP_S(R):
W(J(___y89)) -> W(I(___y89))
CR(S):
see below.

---- CR(R)
---- [Hirokawa and Middeldorp, 2011]
R:

CPS'(R):

CP(R):