bilby said:
The evidence most certainly does support my position. And reality isn't subject to democracy; Nor adjustable by debate. Your opinion on which side 'won' in a debate isn't grounds for determining which was correct, the only way to determine that is scientific.
No, the evidence most certainly does not support your claim that the probability of the lab leak hypothesis on the basis of the available data is negligible. It is anything but that. And of course, reality is not subject to democracy or debate in the sense debate does not change it. On the other hand, debate can and often does affect the probabilistic assessments one should make.
bilby said:
The probability that Covid originated in a lab is vanishingly close to zero, and no sane and well informed person could conclude otherwise.
The probability that the pandemic originated in a lab (whether by the virus being engineered in a lab, or else by the virus being collected from the wild but scaping from a lab) is higher than 0.5, on the basis of the evidence I've seen (which isn't all the evidence there is, of course; I'm not an expert on viruses). It is not, however, close to 1 at this point. But that assessment might change in one direction or another on the basis of further reading - whether by new discoveries or just me reading all data that I haven't read yet.
While the evidence you've seen is different from the evidence I've seen so a difference in rational probabilistic assessments would be unsurprising, "vanishingly close to zero" is just not a rational assessment given the evidence easily found 'in the wild' and even posted in this thread.
bilby said:
Not to anyone who has studied virology, genetics or molecular biology, it doesn't.
But that is false. It is very easy to find virologists who assign high probability to the lab leak hypothesis. The evidence is all over the place, just look it up.
bilby said:
Non-experts are not capable of forming useful opinions on this question.
This is not true. It is true that non-experts cannot form opinions as informed of that of experts. However, non-experts, like anyone else, can, do and should make probabilistic assessments on the basis of the evidence available to them. That includes the opinions of experts of course. But it's not just that: if you have, say, 70% of experts saying A and 30% saying ¬A, the rational assignment is not necessarily .7 to A. In fact, in cases of expert disagreements, factoring in how experts' opinions might be shaped by which group of experts they're with, when you have that kind of 70/30 split or things like that, I would be closer to 0.6 to A, or something like that, all other things equal. Now, not all other things are equal, because even non-experts can take a look at potential sources of biases for the experts - surely, either the 30% are wrong, or the 70% are wrong, so a lot of experts are wrong in a case like that -, and even read the arguments to see whether the experts on one side even address those on the other side - still, this takes time, and one non-expert may well not have that much to dedicate.
As for this case, I do not know what the expert split is. It was almost entirely on the side of non-leak at first. In retrospect, that seems to have been to a considerable extent in-group bias, but I did not know it at the moment, so rationally I assigned very little probability to the lab leak hypothesis. Things have changed ever since, though of course people who strongly said the lab leak hypothesis is obviously false are generally biased not to change their mind (instinctive face-saving perhaps), especially if they are experts.
bilby said:
That leaves each of us with three options:
Either go out and put in the years of effort required to become an expert; Or take the word of those who did that; Or be wrong.
You and repoman have inexplicably chosen option three, which significantly lowers my estimate of your intelligence.
You are far off on this one. And significantly lower your estimate of my intelligence is not rational even if your data were correct. Have you not seen religion, ideology, in-group thinking, defensiveness after defending a position? It's all over the place among humans, even very intelligent ones. Even if the evidence were on your side - it is not -, your estimate should be lowered only slightly.
I, on the other hand, am not going to lower my estimate of your intelligence on the basis of this, as it is not an epistemic mistake I haven't seen you made before.
That aside, as I said in another thread, how about we take a look at this again in, say, 2 years? Or better yet, 4 years? As I said, things take time given a number of biases, but I would expect more people - experts, of course - to change their minds in time, as some already have.
By the way, given that you are not a virologist, how are you assessing which virologists to listen to?