Sense and Reference
Frege's puzzle about informative identities and the idea of a mode of presentation
Planned, not yet written
This rung already has its place in the Philosophy of Language ladder and a fixed job in the order. The prose is what is missing. Writing it out of sequence would break the guarantee that nothing here uses a term before an earlier article defines it.
Will definesenseFrege's puzzlecognitive significance
Assumesreferencenumerical identitytruth condition