premises
#ax_I2

point(1)
point(2)
line(3)
line(4)
~eq_point(1, 2)
inc_po_l(1, 3)
inc_po_l(2, 3)
inc_po_l(1, 4)
inc_po_l(2, 4)

conclusions

eq_line(3, 4)

