let I be Instruction of SCMPDS; ( not I in { [I1,{},<*d1,k1,k2*>] where I1 is Element of Segm 15, d1 is Element of SCM-Data-Loc , k1, k2 is Element of INT : I1 in {4,5,6,7,8} } or InsCode I = 4 or InsCode I = 5 or InsCode I = 6 or InsCode I = 7 or InsCode I = 8 )
assume
I in { [I1,{},<*d1,k1,k2*>] where I1 is Element of Segm 15, d1 is Element of SCM-Data-Loc , k1, k2 is Element of INT : I1 in {4,5,6,7,8} }
; ( InsCode I = 4 or InsCode I = 5 or InsCode I = 6 or InsCode I = 7 or InsCode I = 8 )
then consider I1 being Element of Segm 15, d1 being Element of SCM-Data-Loc , k1, k2 being Element of INT such that
A1:
I = [I1,{},<*d1,k1,k2*>]
and
A2:
I1 in {4,5,6,7,8}
;
( I1 = 4 or I1 = 5 or I1 = 6 or I1 = 7 or I1 = 8 )
by A2, ENUMSET1:def 3;
hence
( InsCode I = 4 or InsCode I = 5 or InsCode I = 6 or InsCode I = 7 or InsCode I = 8 )
by A1; verum