I was quite pleased to see that an article had been written on Go's effect on rational thinking. It's a subject I had been thinking about quite a bit recently. #3 and #4 are the most relevant to my experience of Go and it's effect on my level of rational thinking in general. After playing Go for quite a while, I noticed that it promotes a sort of soft game/decision theoretic strategy to approaching everyday problems and more importantly it makes that approach feel natural. The equilibrium position becomes the natural one.