Sure in the same way you can create an object in FP by sticking functions in a data structure or create functions in a logic programming language by constructing certain relations.

Heck you can even build "objects" in C.

And all of these methods are indeed used in those languages.

But none of those capture the spirit of object-orientation, in the same way that CalculateSomething is not object-oriented, unless it in turn generates a mutable object. That's not to say it's bad code or that it is uncommon, even in say Java. Simply that it's not object-oriented (and these days Java is getting less and less object-oriented anyways, with records and pattern matching explicitly separating data from functions).

Indeed in Java materials and blog posts from > 5 years ago, using pure methods of the form `CalculateSomething` was generally something used begrudgingly, where too many of those methods was specifically called out as an anti-pattern (e.g. the dreaded "utility class").