YOU CAN'T STEP INTO THE SAME RIVER TWICE!!!
(Hearaclitus, Greek circa 503 BC)
This excellent philosophical insight from the ancient greek whom Nietszche extolled as the greatest of philosophers, even though only fragments of his philosophy remain, once understood sets up the dichotomy with Plato, some centuries later, from which all that we are discussing derives.
For if you can't postulate a "river" as it is always changiing, e.g. flowing, nor tree - always growing (Nietzshe), nor human -always forgetting and experiencing anew; than by extension all things change nothing exists in and of itself, there are no first essences or eternal principles. One can contrast this with the Platonic in which idealized forms express the essence of things and exist somewhere outside of our observation for the world of observation and phenomenon is for most observers one of flux. Aristotle and Kant who dealt mightily with this problem came to the postulate of God in order for the observable to have a basis in permanent reality as opposed to flux.
It appears to me that the mathematical problem Barkley was laying out of math as an immutable system rooted in reality(classical) or a theoretical construct of our imagination - "intuitionism" is again this issue of flux or permanent discernible realities.
My impression is that belief in one or the other of these systems is a genetic pre-disposition informed only marginally by our experience. For me a tendancy in the direction of Heraclitus and the wonder of unending differences has been reinforced with age as I forget my early life ane renew my currrent interests and beliefs.
Has the belief in permanency aided economics (or medicine)? Perhaps, but any belief exercised to an extreme is exclusive and shuts out much of what should be known. This is where I believe we are in economics and I see no signs of it changing unless and until the crisis increases significantly. And it will if things are in flux.
Greek Banks: Return Of The Jedi
20 hours ago