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| Current File : /usr/home/beeson/public_html/michaelbeeson/research/FormalTarski/Proofs/Satz2.4.prf |
Length of proof is 1. Level of proof is 1. ---------------- PROOF ---------------- 1 [] E(x,y,y,x). 9 [] -E(xa,xb,xc,xd)| -E(xc,xd,xe,xf)|E(xa,xb,xe,xf). 10 [] E(a,b,c,d). 11 [] -E(b,a,c,d). 18 [hyper,9,1,10] E(b,a,c,d). 19 [binary,18.1,11.1] $F.