Peter

In Spanish, you use a different verb for knowing a fact (saber) from what you use for knowing a person (conocer). So in some languages there is already a primary devision between concepts that we group together under the umbrella term 'knowing'.

(Obviously Spanish is not the only language in which this is the case, it's just the one that comes most easily to my mind because I've spent time studying it.)

P.S. This should probably spark a discussion of whether you can ever really know a person :)