Difference between revisions of "19: Bret Weinstein - The Prediction and the DISC"
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19: Bret Weinstein - The Prediction and the DISC (view source)
Revision as of 04:47, 21 February 2020
, 04:47, 21 February 2020→Transcript
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'''Eric:''' By good we mean contributing to fitness— | '''Eric:''' By good we mean contributing to fitness— | ||
'''Bret:''' Fitness enhancing traits at some costs late in life, then they will tend to be accumulated by selection. And the reason for that is because, well, there are two ways to think of it, really. If a negative trait occurs very late in life, then a large number of individuals who have the gene for that trait will not live long enough to experience the harm. So if it came bound to a positive thing early in life and you're dead before the late life harm accrues, you got away with it. Right? So William's point was, he was building on earlier work of | '''Bret:''' Fitness enhancing traits at some costs late in life, then they will tend to be accumulated by selection. And the reason for that is because, well, there are two ways to think of it, really. If a negative trait occurs very late in life, then a large number of individuals who have the gene for that trait will not live long enough to experience the harm. So if it came bound to a positive thing early in life and you're dead before the late life harm accrues, you got away with it. Right? So William's point was, he was building on earlier work of Medawar, but let's skip that for the moment. | ||
His point was, because of tradeoffs, you will have lots of traits that are good early and bad late. Selection sees the early traits much more clearly than it sees the late traits, and it prioritizes them because of the discounting that arises because so many individuals aren't around to experience the late-life harm, and if they are around experienced the late-life harm, a lot of their reproduction is behind them anyway. So they count less. Selection counts more early in life. And this timer starts at the moment of first reproduction, the usual moment of first reproduction for your species. So this was a beautiful hypothesis, and it was beautifully articulated with many predictions, which is the way really good work is done. And we knew, at the point that I was entering graduate school, we knew that the hypothesis was right. It was a theory. | His point was, because of tradeoffs, you will have lots of traits that are good early and bad late. Selection sees the early traits much more clearly than it sees the late traits, and it prioritizes them because of the discounting that arises because so many individuals aren't around to experience the late-life harm, and if they are around experienced the late-life harm, a lot of their reproduction is behind them anyway. So they count less. Selection counts more early in life. And this timer starts at the moment of first reproduction, the usual moment of first reproduction for your species. So this was a beautiful hypothesis, and it was beautifully articulated with many predictions, which is the way really good work is done. And we knew, at the point that I was entering graduate school, we knew that the hypothesis was right. It was a theory. | ||