[deadmetheny]

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.

[sgt101]

But we know really quite accurately how people en-mass move and associate prior to intervention. The proper models are using this information.