Dr.EM_Chicago said:The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.
That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.
NauseaFreeNow said:Right, and one flattering data point from a group buy is not consistency.
Thank you — that is the clearest version of this I have read, and I have read a lot of them. Printing the relevant bit and taking it with me.
Dr.EM_Chicago said:The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.
This is where I part company with the consensus forming above. I would resist the confidence. Half of what this board was certain about two years ago has since been quietly dropped, and nobody went back to correct the threads.
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Shop Reference StandardsAdding the numbers, since they settle part of this. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.