Frege's puzzle shows that 'Hesperus is Hesperus' and 'Hesperus is Phosphorus' differ in cognitive significance despite sharing truth conditions, a difference sentence types cannot capture.
?Rate how convincing each reason is below to see the overall strength.
No one has weighed in yet. Be the first to share reasons for or against this statement.
Sign in or register to share your perspective on this statement.
Phosphorus(Standard example in philosophy of language)
A proper name used to designate the morning star (the planet Venus), functioning as a rigid designator
Truth conditions(used to describe how we determine whether a thought accurately represents reality)
The specific circumstances or facts that would make a statement true or false—what has to be the case for a thought to be correct.
sentence types(in logic and language)
General categories of sentences rather than individual ones; for example, the sentence type 'All cats are animals' as a pattern, not just one written instance of it.