... PnUTHENTHENY=qlVY=q2v(II)THENY=qnv0- do,Uvavla cac phan tli- sinh nguyen thuy,Pivaqila cac xau gia tli-,1 :: :; i :: :; n.Ngoai raPI<P2< <Pn·Giira hai die'm sat nhau tren true hoanhPiUvaPi+IUtheo ... CO' ban eho I~p lu~n ngon ngir, trong do eocac qui titc:(RMP: Rule of Modus Ponens ): (P-+Q),PQ(RPI: Rule of Propositional Inference ): (P(x, u)-+Q(x, v))(aP(x, u)-+aQ(x, v)) .3.TIEP ... tITdonvi.2.Neu avaa' la hai ehu6itirnhanthl tanoia:Sa' khivoim6i xEX, tir x:Saxhoacx:Sa' xsuy ra x:S ax:Sa'x vatir x ~ ax ho~e x ~ a'x suy ra x ~ ax...