Alex Wissner-Gross thinks that he has worked out the physical basis for intelligence. He has devised an equation that in his opinion tells every system how to behave in a way that we would label intelligent. His equation is easy enough to write down:

see image

The S is related to the entropy of the system and the T is a notional "temperature". If you know math then the triangle symbol will be familiar to you as the gradient and the equation roughly says that there is force in the direction of increasing entropy. This force - the causal entropic force - is what is equated to intelligence.

If you have encountered the ideas of thermodynamics or information theory then you may already know that entropy and information are intertwined in ways that are very complicated once you go beyond a general ideas of order and disorder. So it isn't really surprising that entropy would figure in any theory of intelligence. This isn't the first time that "thinkers" have linked the two together, but mostly the connection has been stated in vague, almost philosophical, ways.

Now we have an exact equation.

https://www.i-programmer.info/news/105-artificial-intelligence/6931-an-equation-for-intelligence.html