let R be Ring; for I being Instruction of (SCM R) st InsCode I = 6 holds
ex i2 being Nat st I = goto (i2,R)
let I be Instruction of (SCM R); ( InsCode I = 6 implies ex i2 being Nat st I = goto (i2,R) )
A1:
( I = [0,{},{}] or ex a, b being Data-Location of R st I = a := b or ex a, b being Data-Location of R st I = AddTo (a,b) or ex a, b being Data-Location of R st I = SubFrom (a,b) or ex a, b being Data-Location of R st I = MultBy (a,b) or ex i1 being Nat st I = goto (i1,R) or ex a being Data-Location of R ex i1 being Nat st I = a =0_goto i1 or ex a being Data-Location of R ex r being Element of R st I = a := r )
by SCMRING2:7;
assume
InsCode I = 6
; ex i2 being Nat st I = goto (i2,R)
hence
ex i2 being Nat st I = goto (i2,R)
by A1; verum