Unless we want to say that from the get-go the pro-cryonics case was super strong.
I don’t think it has to be super-strong. It just has to be reasonable. It was reasonable at the time, and as excuses get knocked down without any decrease in fraction of non-adopters, it becomes increasingly clear that they were not the real reason for the non-adopters and that they are non-adopters for pre-determined reasons which have little to do with the science.
You can replace “excuses” with “justifications” and “non-adopters” with “adopters” and get a similar argument in the other direction.
This amounts to Bulverism: if you assume that your opponents are wrong (i.e. you assume that their excuses got successfully knocked down), then you can claim there must be some irrationality that explains why they remain your opponents. But you’re not supposed to assume that. It’s like saying “excuses for opposing homeopathy get knocked down, but the allopaths don’t become homeopaths. Obviously this shows they are alloapths for irrational reasons with nothing to do with the science”.
I don’t think it has to be super-strong. It just has to be reasonable. It was reasonable at the time, and as excuses get knocked down without any decrease in fraction of non-adopters, it becomes increasingly clear that they were not the real reason for the non-adopters and that they are non-adopters for pre-determined reasons which have little to do with the science.
You can replace “excuses” with “justifications” and “non-adopters” with “adopters” and get a similar argument in the other direction.
This amounts to Bulverism: if you assume that your opponents are wrong (i.e. you assume that their excuses got successfully knocked down), then you can claim there must be some irrationality that explains why they remain your opponents. But you’re not supposed to assume that. It’s like saying “excuses for opposing homeopathy get knocked down, but the allopaths don’t become homeopaths. Obviously this shows they are alloapths for irrational reasons with nothing to do with the science”.