Wait a second... I'm really an empiricist?

[theapportioner]

That example confuses knowledge with truth. Deductively, you could come to that conclusion from certain premises. "The perception of them must exist" may be a valid conclusion - it may be true by definition, but this is distinct from R v E. How do we know that it is true - we don't know, or we can't validate something by the definitions alone. Es and Rs would say that you know by intuition, reason, experience, etc.

I think that the Rs and/or Es don't give a satisfactory explanation of what it means to know. Take the expression "hail!". What does it mean? How does one know what it means, how does one know if its usage is correct or not? Obviously you need the ability to think and a familiarity of the English language, but something else is required - context.