CFS/FMS/hypothyroidism are ridiculously similar.

Your perception of similarity is based on dodgy inferences, and as such, I have no reason to care about it.

That's a good point, and it's the heart of my argument (well, that and the TSH test).

So I propose a test for that. Ask a doctor you trust: "Can you tell CFS and hypothyroidism apart by clinical symptoms rather than by blood test?"

I have done this, and I think it's not possible. But you are right not to take my word for it.

If it is, I'd love to know, and it would be a great blow to this argument, which I am trying to defeat, so thank you both for the question and for the answer.