# Does a complex problem need a complex model?

I ask in general if a complex problem needs a complex model, more concrete: The spread of corona in our society is a complex problem, which depends on several parameters (even parameters as education).

Is it a priori clear that we can't model this problem with a simple model and we have to use more advanced stuff (e.g. agent-based models) to generalize or can't we say something like this apriori?

• Complex is a vague definition, and depends on how you define it. Generally, complex means there are multiple valid ways to solve the problem, so in this case, there's absolutely no need for a complex model. Something as simple as a Bayesian network can be used Dec 1 '21 at 5:02