Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "3Blue1Brown" channel.

  1.  @jared_bowden  No, I think the double helix is part of the replication mechanism. For example, PCR only works on DNA, not RNA. So the SARS-CoV-2 virus test involves retrotranscription of the traces of viral RNA to DNA before it can be amplified via PCR to detectable levels. The redundancy in the genetic code comes from having 64 different symbols code for just 20 different amino acids.
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  2. 15:36 OK, here’s an interesting thought: one situation where, it seems, this issue of prior probabilities is explicitly ignored, is in the legal system. Here in 🇳🇿, we had a high-profile murder case where all details of the accused had been kept suppressed until just the last few days. It turns out the reason was that he was implicated in the deaths of some other victims, and the court wanted to be sure that these other cases would not influence the verdict in this one. Whereas it is now clear he is a serial offender, who has done this sort of crime several times, and will likely do it again. In short, it seems the legal idea that each criminal trial should be run entirely independently, without regard to what might be happening in other trials of the same perp, is directly counter to Bayes’ Theorem.
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  3. 17:30 The traditional representation of Bayes’ Theorem in terms of probabilities can be recast to show a nice, symmetry, though: P(E∧H) = P(E|H)P(H) = P(H|E)P(E)
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  4. 7:21 Because of course you wouldn’t trust what a human tells you, the computer must be correct!
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  5. 2:10 See, they had trolling in those days, too. But ... Lord Kelvin!? shock horror
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  6. Maybe you are thinking of the concept of “Hamming distance”?
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