(ACL2-NUMBERP-WHEN-NATP)
(ACL2-NUMBERP-WHEN-INTEGERP)
(ACL2-NUMBERP-WHEN-RATIONALP)
(RATIONALP-WHEN-NATP)
(RATIONALP-WHEN-INTEGERP)
(INTEGERP-WHEN-NATP)
(<=-OF-0-WHEN-NATP)
(REAL/RATIONALP-WHEN-NATP)
(REAL/RATIONALP-WHEN-INTEGERP)
