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madhatter920
Sure. It's unthinkable, not unknowable. To be unthinkable, it's just not something you would think of on your own. You can know it if it already exists.
JoannaBe
Why would it have to already exist to be knowable?
madhatter920
I didn't word it very well. Something that is unthinkable can only be known if it already exists. But something that is not unthinkable does not have to exist to be known.