theorem Th74: :: CQC_THE2:74

for A being QC-alphabet
for p, q being Element of CQC-WFF A
for x being bound_QC-variable of A st not x in still_not-bound_in p holds
( (All (x,(p => q))) => (p => (All (x,q))) is valid & (p => (All (x,q))) => (All (x,(p => q))) is valid )