[eyelidlessness]

> Identity doesn't imply 'value' equality, that's the whole point of mutability!

That’s exactly the point I started with!

> Conversely, two objects can have the same 'value' while having different identities. Values and objects are different beasts.

Agree completely. My point—my only point—was that identity implies mutability. Without mutability, identity distinct from value doesn’t mean anything.