>To me, version 10 of Mac OS is still the continuation of version 9 of Mac OS, even though they're fundamentally different systems under the hood. Sure, and it

>To me, version 10 of Mac OS is still the continuation of version 9 of Mac OS, even though they're fundamentally different systems under the hood. Sure, and it carries over certain parts and leaves out others. Substantially similar? I'll buy that. Arguably the same thing, ontologically? I think that's a lot harder to prove, which is what the OP I replied to was saying.