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I suppose nobody is really an expert in technologies that don't yet exist anywhere outside sci-fi books, but cryobiologists and neurobiologists are the people best equipped to undestand the type and extent of damage that crypreservation causes to nervous tissue and the effect this damage is likely to have on personal identity.
At risk of repeating myself: determining whether damage has passed information-theoretic death falls under the purview of physics and cryobiology, among a variety of other fields. That is not at all the same thing as saying that it is "in the area of expertise" of every physicist and cryobiologist, and thus a (hypothetical) survey of them would be "expert opinion".
Frankly, I suspect I've learned all I can from this discussion. I'll read your reply in case I'm wrong, but I'm tapping out.
It seems that you are venturing into No true Scotsman territory:
Clearly you can divide any research field in sub-fields and sub-sub-fields. You could even try to argue that nobody is an expert in anything they haven't pubished a scientific paper on (and even then, maybe the paper had multiple authors and Author 1 was not an expert in what Author 2 did, and the referees who did the peer review weren't really experts, and so on...), but I don't think that would lead to a viable concept of expertise.
Realistically, we expect researchers within any relatively s...
In the past, the Cryonics Institute has had a policy that said that they would not accept anyone who is not a member. This has changed. The policy now is that someone who has full legal authority over your body can sign you up after you die. It costs $36,250 to be frozen if you are not signed up, which is more expensive. They also will not do anything until you have been on dry ice for 2 weeks after they have been contacted, so not being a member is more risky.
This is very important news for anyone who is currently cryocrastinating. It means that you can drastically increase your chances of survival without filling out any forms. All you have to do is tell a loved one you want to be frozen upon death, and that you would like them to take responsibility for making sure this happens. This takes literally 30 seconds. Do it now!
This news might also be a reason to not sign up right away, if you think something better (like radical life extension or uploading) will come along in your lifetime. We should discuss this in the comments.
Edit: The general consensus of this discussion is that this is a really bad reason not to sign up for cryonics.