Sindbad~EG File Manager

Length of proof is 11.  Level of proof is 8.
 
---------------- PROOF ----------------
 
24 [] T(xa,xb,xb).
25 [] -T(xa,xb,xc)|T(xc,xb,xa).
26 [] T(xa1,xa1,xb1).
28 [] -T(xa,xb,xd)| -T(xb,xc,xd)|T(xa,xb,xc).
29 [] -T(xa,xb,xc)| -T(xa,xc,xd)|T(xb,xc,xd).
105 [] -Col(xa,xb,xc)|T(xa,xb,xc)|T(xb,xc,xa)|T(xc,xa,xb).
120 [] -T(xp,xa,xb)|xa=xp|xb=xp|sameside(xa,xp,xb).
121 [] -T(xp,xb,xa)|xa=xp|xb=xp|sameside(xa,xp,xb).
122 [] -sameside(a,p,b).
123 [] Col(a,p,b).
124 [] -T(a,p,b).
125 [binary,122.1,121.4] -T(p,b,a)|a=p|b=p.
128 [binary,123.1,105.1,unit_del,124] T(p,b,a)|T(b,a,p).
167 [ur,29,26,124] -T(p,a,p).
171 [ur,28,24,124] -T(p,b,p).
203 [para_from,125.2.1,124.1.1,unit_del,26] -T(p,b,a)|b=p.
649 [para_from,203.2.1,171.1.2,unit_del,26] -T(p,b,a).
688 [binary,649.1,128.1] T(b,a,p).
754 [binary,688.1,25.1] T(p,a,b).
958 [binary,754.1,120.1,unit_del,122] a=p|b=p.
1230 [para_from,958.1.1,167.1.2,unit_del,26] b=p.
1244 [para_from,1230.1.1,754.1.3] T(p,a,p).
1245 [binary,1244.1,167.1] $F.