Assertion: octahedron's face | /r/CapableOf | touch the homeface
Facets:
value: at a vertex
type: LOCATION
Source sentences:
text: I call this the "no mixing rule": all the colored facets that belong to the same face (when the puzzle is solved) can only ever appear on that face (the "home" face) or the three triangular faces which touch the "home" face at a vertex.