let X be Subset of CQC-WFF ; :: thesis: for p being Element of CQC-WFF
for x being bound_QC-variable holds X |- (All x,p) => p
let p be Element of CQC-WFF ; :: thesis: for x being bound_QC-variable holds X |- (All x,p) => p
let x be bound_QC-variable; :: thesis: X |- (All x,p) => p
(All x,p) => p in Cn X by Th33;
hence X |- (All x,p) => p by Def9; :: thesis: verum