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Current File : /usr/home/beeson/public_html/michaelbeeson/research/FormalTarski/Proofs/Satz2.5.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).
11 [] E(a,b,c,d).
12 [] -E(a,b,d,c).
20 [hyper,9,11,1] E(a,b,d,c).
21 [binary,20.1,12.1] $F.

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