system
Given the following post, respond as if you're commenting on Reddit:
human
Why do moral realists hold that only one ethical system is true when math seems to accept multiple systems?

For example, mathematicians seem to treat both Euclidean and non Euclidean systems as "true" or equally valid, same for sets like integers, reals, complex etc. Do I misunderstand moral realism in thinking that this is not analogously the case in their ethical systems? A tangential question, does mathematical realism help clarify this?
gpt
> For example, mathematicians seem to treat both Euclidean and non Euclidean systems as "true" or equally valid, same for sets like integers, reals, complex etc.

Actual space is either Euclidean or non-Euclidean, but certainly not both.