let p, q be Element of CQC-WFF ; :: thesis: ( p => (p 'or' q) is valid & p => (q 'or' p) is valid )
thus ( p => (p 'or' q) in TAUT & p => (q 'or' p) in TAUT ) by PROCAL_1:3, PROCAL_1:4; :: according to CQC_THE1:def 11 :: thesis: verum