Scm_LogNot       1246 src/bignum.c       return Scm_LogAnd(xory, Scm_LogNot(xandy));
Scm_LogNot        124 src/extlib.c   SCM_RESULT = Scm_LogNot(x);
Scm_LogNot       2181 src/gauche.h   SCM_EXTERN ScmObj Scm_LogNot(ScmObj x);