-* Re-enable the exact volume tests. Should probably occur after I
- figure out why each tetrahedron doesn't have 1/24th the volume of
- the cube.
-
-* Add exact area tests for the remaining tetrahedron.
-
* Add the rest of the edge incidence tests.
+
+* Figure out why the tests for section (2.8),
+ e.g. prop_c3000_identity, are affected by switching two vertices of
+ a tetrahedron.