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Length of proof is 5.  Level of proof is 4.
 
---------------- PROOF ----------------
 
51 [] Col(xa,xa,xb).
103 [] xa=xb|xp=xq| -Col(xp,xq,xa)| -Col(xp,xq,xb)| -Col(xp,xq,xr)|Col(xa,xb,xr).
109 [] M(xa,xm,xa)|xm!=xa.
123 [] -M(xp,xa,xq)| -M(xp,xb,xq)|xa=xb.
174 [] M(xa,midpoint(xa,xb),xb).
213 [] xa=xb|Col(xa,xb,midpoint(xp,reflect(xa,xb,xp))).
297 [] a!=b.
298 [] reflect(a,b,p)=p.
299 [] -Col(a,b,p).
430 [para_from,298.1.1,213.2.3.2,unit_del,297] Col(a,b,midpoint(p,p)).
462 [ur,103,297,51,51,51,299] x=x.
476 [binary,462.1,109.2] M(x,x,x).
1535 [hyper,123,174,476] midpoint(x,x)=x.
9225 [para_from,1535.1.1,430.1.3] Col(a,b,p).
9226 [binary,9225.1,299.1] $F.