[nyssos]

> Could you please briefly explain the indispensibility argument?

An extremely rough caricature:

- Scientific realists claim that we should believe the entities that are indispensable to our best scientific theories (electrons, for instance) exist.

- Mathematical entities are indispensable to our best scientific theories

- So scientific realists should be realists about mathematical entities.

[082349872349872]

Thanks. I guess I'm an instrumentalist then (due to having a strong pragmatist streak?) because I'm unconvinced that "existence" in this caricature even denotes.