S1U1B3C3O1N1T1R1A1R1Y4
18 points
SUBCONTRARY is validvalid
[n SUBCONTRARIES]
a proposition so related to another that though both may be true they cannot both be false [n SUBCONTRARIES]
[n SUBCONTRARIES]
a proposition so related to another that though both may be true they cannot both be false [n SUBCONTRARIES]