let A be QC-alphabet ; :: thesis: for p, q being Element of CQC-WFF A holds q => (p 'or' q) in TAUT A
let p, q be Element of CQC-WFF A; :: thesis: q => (p 'or' q) in TAUT A
q => (('not' p) => q) in TAUT A by LUKASI_1:5;
hence q => (p 'or' q) in TAUT A by Lm1; :: thesis: verum