let I be Instruction of SCMPDS; :: thesis: ( not I in { [I1,{},<*d1,k1*>] where I1 is Element of Segm 15, d1 is Element of SCM-Data-Loc , k1 is Element of INT : I1 in {2,3} } or InsCode I = 2 or InsCode I = 3 )
assume I in { [I1,{},<*d1,k1*>] where I1 is Element of Segm 15, d1 is Element of SCM-Data-Loc , k1 is Element of INT : I1 in {2,3} } ; :: thesis: ( InsCode I = 2 or InsCode I = 3 )
then consider I1 being Element of Segm 15, d1 being Element of SCM-Data-Loc , k1 being Element of INT such that
A1: I = [I1,{},<*d1,k1*>] and
A2: I1 in {2,3} ;
( I1 = 2 or I1 = 3 ) by A2, TARSKI:def 2;
hence ( InsCode I = 2 or InsCode I = 3 ) by A1; :: thesis: verum