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| Current File : /usr/home/beeson/public_html/michaelbeeson/research/FormalTarski/Proofs/Satz6.17b.prf |
Length of proof is 1. Level of proof is 1. ---------------- PROOF ---------------- 49 [] -Col(xa,xb,xc)|Col(xb,xa,xc). 139 [] Col(p,q,r). 140 [] -Col(q,p,r). 241 [binary,139.1,49.1] Col(q,p,r). 242 [binary,241.1,140.1] $F.