Sabine Hossenfelder on Chiara Marletto


Chiara Marletto worked with David Deutsch on Constructor Theory ” a new mode of explanation in fundamental physics, first sketched out by David Deutsch, a quantum physicist at the University of Oxford, in 2012.[1][2] Constructor theory expresses physical laws exclusively in terms of what physical transformations, or tasks, are possible versus which are impossible, and why”

Marletto’s book is indeed titled “The Science of Can and Can’t” it’s about the role of counterfactuals in fostering science growth, It’s about method and so Sabine is on it. I was actually wondering ether I should read Marletto’s book now it is on the list, maybe not

Sabine’s definition of emergence “I have, above, used emergent to mean a property of a composite system that can be derived from the laws of the system’s constituents, but which doesn’t make sense on the level of constituents. Conductivity, for example, is a property of materials, but it makes no sense for individual electrons. Temperature is another example. Waves in water, cyclones, the capacity to self-reproduce—these are all emergent properties.” Thiis is Weak Emergence defintion, the strong one would imply that the emergent propertieds cannot be derivied from the laws of its components at all “There is no known example in the real world for strong emergence (which is why physicists normally use the word “emergence” as synonym for “weak emergence”)”


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