Assertion: tetrahedron's edge | /r/HasProperty | diagonals of the cube
Facets:
Source sentences:
text: If you obey "each vertex is a vertex of the cube", then the statement that "each edge is a diagonal of one of the cube's faces" is wrong, maximally three edges of the tetrahedron can be diagonals of the cube, the others must lie on the edges of the cube.