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There are Nice Oss tools for playing with mental models, e.g. See https://nocomplexity.com/causalloopdiagram/ a clone of loopy.

This is amazing, it took me some time to understand it, but now I am blown away by the simplicity of the tool and the possibilities it holds.

I already started gaining insights in some systems I am currently involved with.

Could you point me to more resources like this?