What’s missing from side-effect freedom or pureness? That is the property that allows replacing an expression with its value.
Not sure what you are talking about now.
> What’s missing from side-effect freedom or pureness? That is the property that allows replacing an expression with its value.
I think you are just unfamiliar with the terminology, that's all.
See Wikpedia again:
> If a pure function is called with arguments that cause no side-effects, the result is constant with respect to that argument list (sometimes called referential transparency or idempotence), i.e., calling the pure function again with the same arguments returns the same result. (This can enable caching optimizations such as memoization.)
(https://en.wikipedia.org/wiki/Functional_programming#Pure_fu...)
There you go. All 3 terms in once sentence. Maybe, again, you disagree with Wikipedia and the definition and that's your good right, but I don't see any point in prolonging the discussion over that.
Referential transparency is not a property of programming languages but expressions (or more general, parts of computer programs).
> It means that one can replace a reference to a thing with the thing itself.
That's not the common definition at all. Read the link I posted. In any case, I'm talking about evaluatable expressions, you talk about "references" - however you define that.
Even in your own stackoverflow link, the accepted answer says this:
> the thing that an expression refers to