Modes of Representation

Lois Lane knows that Superman can fly, but she does not know that Clark Kent can fly. How can that be, given that Superman and Clark are one and the same? To answer this question, Frege famously distinguished the reference of a name (the thing it is a name of) from what he called its ''sense'' or ''mode of presentation''. The sense was meant to capture our (necessarily limited) perspective on refe...