premises
#ax_sym_ncol

point(1)
point(2)
point(3)
~col(1, 2, 3)

conclusions

~col(1, 3, 2)
~col(2, 1, 3)
~col(2, 3, 1)
~col(3, 1, 2)
~col(3, 2, 1)

