This is such a common confusion, someone made a handy diagram for telling apart the firms comprising the cross product of {"Black", "Bridge"} x {"rock", "water"

This is such a common confusion, someone made a handy diagram for telling apart the firms comprising the cross product of {"Black", "Bridge"} x {"rock", "water", "stone"}. https://i.redd.it/x0jeiofl7j471.jpg https://i.redd.it/x0jeiofl7j471.jpg