This is an old joke, but I had to add another twist to it!

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**Sociology **is a subset of **psychology **– if you know how an individual behaves, then simulating the interaction between multiple individuals should be easy.

**Psychology **is a subset of **biology **– if you know how the brain and the rest of the body works, then psychology is just a “simplified” biological model.

**Biology **is a subset of **chemistry **– if you know the chemical processes, then simulating a biological entity should be relatively easy.

**Chemistry **is a subset of **physics **– if you know how matter and energy interacts, then all the chemical processes can be predicted.

**Physics **is a subset of **mathematics **– if you know how to build a model / system, then it is “easy” to observe a phenomena and build a mathematical model of it.

**Mathematics **is a subset of **design & test** – if you know that axioms (definitions) is what creates a model, then selecting and validating the axioms, is the only way to design the model.

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