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Re:Why it’s so hard to make a good Covid-19 model by DonHopkins on Thursday April 09, 2020 @12:41PM (#22824365)
It's like trying to calculate the Butterfly Effect during winter at the Reserva de la Biosfera Mariposa Monarca (Monarch Butterfly Biosphere Reserve).

https://en.wikipedia.org/wiki/Butterfly_effect

https://en.wikipedia.org/wiki/Monarch_Butterfly_Biosphere_Re...

Re:Why it’s so hard to make a good Covid-19 model by sgt101 on Thursday April 09, 2020 @12:44PM (#22824412)
I don't think it is - I think you can write "x is like y" but you have to understand and explain why. Otherwise I can say "a hippo is like a bright blue sky" and then claim that I am right! I don't think that this is like modelling the impact of a butterfly on storms - I think this is more like modelling the diffusion of a bottle of dye in a swimming pool.
Re:Why it’s so hard to make a good Covid-19 model by deadmetheny on Thursday April 09, 2020 @01:08PM (#22824732)
Grandparent is somewhat nonsensical, but I think what they were trying to say is that since human society is a highly dynamical system, it's not really possible to have a highly accurate model to represent how COVID-19 is going to spread. The best we can do is use naive models and plan around worst-case scenarios.
Re:Why it’s so hard to make a good Covid-19 model by sgt101 on Thursday April 09, 2020 @01:52PM (#22825275)
But we know really quite accurately how people en-mass move and associate prior to intervention. The proper models are using this information.