Full Idea
If someone argued that assuming the existence of the Equator explains nothing, and it has no causal powers, so everything would be the same if it didn't exist, so we needn't accept its existence, we should gape at the crudity of the misunderstanding.
Gist of Idea
It is absurd to deny the Equator, on the grounds that it lacks causal powers
Source
Michael Dummett (Frege philosophy of mathematics [1991], Ch.15)
Book Reference
Dummett,Michael: 'Frege: philosophy of mathematics' [Duckworth 1991], p.182
A Reaction
Not me. I would gape if someone argued that latitude 55° 14' (and an infinity of other lines) exists for the same reasons (whatever they may be) that the Equator exists. A mode of description can't create an object.