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Length of proof is 16.  Level of proof is 4.
 
---------------- PROOF ----------------
 
50 [] -Col(xa,xb,xc)|Col(xb,xa,xc).
52 [] Col(xa,xa,xb).
103 [] xp=xq| -Col(xp,xq,xr)|Col(xq,xp,xr).
250 [] -samesideline(xa,xb,xp,xq)|Col(xp,xq,ss1(xa,xb,xp,xq)).
251 [] -samesideline(xa,xb,xp,xq)|Col(xp,xq,ss2(xa,xb,xp,xq)).
252 [] -samesideline(xa,xb,xp,xq)|T(xa,ss1(xa,xb,xp,xq),ss3(xa,xb,xp,xq)).
253 [] -samesideline(xa,xb,xp,xq)|T(xb,ss2(xa,xb,xp,xq),ss3(xa,xb,xp,xq)).
254 [] -samesideline(xa,xb,xp,xq)|xa!=ss1(xa,xb,xp,xq).
255 [] -samesideline(xa,xb,xp,xq)|xb!=ss2(xa,xb,xp,xq).
256 [] -samesideline(xa,xb,xp,xq)|ss3(xa,xb,xp,xq)!=ss1(xa,xb,xp,xq).
257 [] -samesideline(xa,xb,xp,xq)|ss3(xa,xb,xp,xq)!=ss2(xa,xb,xp,xq).
259 [] -samesideline(xa,xb,xp,xq)| -Col(xp,xq,xa).
260 [] -samesideline(xa,xb,xp,xq)| -Col(xp,xq,xb).
261 [] -T(xa,xu,xc)| -T(xb,xv,xc)| -Col(xp,xq,xu)| -Col(xp,xq,xv)|xp=xq|xc=xu|xc=xv|xa=xu|xb=xv|Col(xp,xq,xa)|Col(xp,xq,xb)|samesideline(xa,xb,xp,xq).
263 [] a!=b.
264 [] samesideline(p,q,a,b).
265 [] -samesideline(p,q,b,a).
269 [] ss1(p,q,a,b)=t1.
270 [] ss2(p,q,a,b)=t2.
271 [] ss3(p,q,a,b)=t3.
337 [binary,264.1,260.1] -Col(a,b,q).
338 [binary,264.1,259.1] -Col(a,b,p).
339 [binary,264.1,257.1,demod,271,270] t3!=t2.
340 [binary,264.1,256.1,demod,271,269] t3!=t1.
341 [binary,264.1,255.1,demod,270] q!=t2.
342 [binary,264.1,254.1,demod,269] p!=t1.
343 [binary,264.1,253.1,demod,270,271] T(q,t2,t3).
344 [binary,264.1,252.1,demod,269,271] T(p,t1,t3).
345 [binary,264.1,251.1,demod,270] Col(a,b,t2).
346 [binary,264.1,250.1,demod,269] Col(a,b,t1).
397 [binary,337.1,50.2] -Col(b,a,q).
416 [binary,338.1,50.2] -Col(b,a,p).
789 [binary,345.1,103.2,unit_del,263] Col(b,a,t2).
820 [binary,346.1,103.2,unit_del,263] Col(b,a,t1).
915 [hyper,261,344,343,820,789,unit_del,340,339,342,341,416,397,265] b=a.
936 [para_from,915.1.1,416.1.1] -Col(a,a,p).
937 [binary,936.1,52.1] $F.