Grice on Top of the Golden Mountain

From Stanford, "nonexistent objects", notes, online:

"The round square exemplifies only nuclear roundness and squareness, while every existent square exemplifies extranuclear squareness. The (nonexistent) golden mountain exemplifies only nuclear goldenness and mountainhood, whereas every existent mountain exemplifies extranuclear mountainhood. One might argue that the principle of contradiction concerns extranuclear properties only and that a thing's nuclear mountainhood does not entail that the thing can be perceived and is located in space, since a thing that exemplifies only nuclear mountainhood is not a mountain in the usual sense. Such an extension of MOTne would bring MOTne very close to the dual copula theory."