you still don't have any evidence

This is a larger issue here than just cryonics, which might be why you're getting some downvotes. While few of the things we've been referring to would be admissible in a courtroom, the sense in which we use the word "evidence" is a bit more general than that. (Do, in particular, read the post linked within the wiki article.)

And it's not just a matter of idiosyncratic word usage— the way we think of evidence really is better suited to figuring things out than the working definition most people use in order to say things like "There's no real evidence that people evolved from animals, because you weren't there to see it happen!"

What we mean is that there are plenty of facts about our physics and our biology that fit into "how we'd expect the world to look if it's true cryonics works", but don't fit into any stated version of "how we'd expect the world to look if cryonics is doomed to failure". These are, in fact, pieces of evidence that cryonics should work.

It's the same principle behind Feynman's lecture "There's Plenty of Room at the Bottom", when he discussed nanotechnology in theory. Of course he couldn't point to full examples of what he was talking about, but it was very valid to say that 'if physics works the way we think it does, then these things should be quite possible to do'.

Burden of proof? Did you look at the giant amount of information already written on cryonics?

Fine, here are my answers to my own questions.

• Do you think that the cryopreservation process itself damages the brain cells enough to destroy the mind?

No. Cryopreserving some tissues is common today. Organs from mammals have already been cryopreserved and transplanted. Electron micrographs of cryopreserved brain tissue show almost no degradation. There is an issue with microfractures, but the amount of information destroyed by them is minimal. The fractures are very few and translate tissue along a plane by a few microns. The other problem is ischemic injury. This is mitigated by having standby procedures and ID tags with instructions on how to begin cooling the body. Brain cells don't immediately die when deprived of oxygen, but they do start an ischemic cascade that can't be prevented currently. The cascade takes several hours at normal body temperature, and is drastically extended if the body is brought close to freezing.

• Do you think that long-term storage at low temperatures damages the brain enough to destroy the mind?

No. Biochemistry is basically stopped at 77K. The only degradation occurs from free radicals caused by cosmic rays. About 0.3 milliSieverts is absorbed each year. The LD50 for acute radiation poisoning is 3-4 Sieverts with current medicine. That's at least 10,000 years of cosmic rays. The human body itself contains some radioactive isotopes, but if you do the math it's still well over 1,000 years before radiation poisoning is an issue.

• Do you think that no future technology will be able to recover the mind from a cryopreserved brain?

No. See my comment about microtomes, microscopes, and brain emulation. That's just using slightly improved technology. A superintelligence with molecular nanotechnology certainly wouldn't have a problem reviving a corpsicle.

Whew, that was a lot of text and links. Once you said the discussion was over I couldn't resist.