
premises
# TH_9
% if two points A and B are incident to a same line
% and there is a point C such that point B is between points A and C
% then point C is also incident to that line

point(1)
point(2)
point(3)
line(4)
inc_po_l(1,4)
inc_po_l(2,4)
bet(1,2,3)

conclusions

inc_po_l(3,4)
