You originally left that as an open question: What I meant was that in any language anyone would design, they would be identical, but that if someone wanted to

You originally left that as an open question: What I meant was that in any language anyone would design, they would be identical, but that if someone wanted to design a language explicitly to disprove this hyphothesis, they could probably do it. I'm not even sure of that, actually. The weaker thesis is harder to contradict, though.