 Frege’s puzzle can be posed as a question about propositional attitude attributions. (We will use the verb ‘believe’ in the discussion of these puzzles. Similar puzzles arise with other propositional attitude verbs.) Consider, for example, Lois Lane before her discovery of Superman’s “true identity,” pretending that the Superman stories as actual fact. Lois is familiar with Clark Kent, her fellow employee, and Superman, the hero she most admires, but she does not recognize that the person she calls ‘Clark Kent’ is identical with the person she calls ‘Superman’. (This doesn’t really do justice to what Lois fails to realize and there are problems specifying what Lois is ignorant of. See the supplementary document: