Thanks for that... These little rants are a great idea. It has given me lots to think about and leads to chase up. Please do more of them. I was first aware of Francisco Varela as the student of G. Spencer Brown who expanded his Laws of Form to include self-reference. That was perhaps the quintessential cybernetic move, but I’m not sure if Laws of Form, despite its basis in distinction, could be regarded as cognitivist, what with the kinds of equations that Spencer Brown wrote down in its language. It seems a bit like if you start with the rationals and then say that every irreducible equation with rational coefficients has a solution, then hey, you’re no longer in the rationals!