One of many interviews with Chiara Marletto in connection with her book on Constructor Theory (“The Science of Can and Can’t” which I started but didn’t finish yet – here again after I did finish it), this one by Sean Carroll, who I consider to be one of the more grounded theoretical physicists and science communicators.

Particularly interesting because as well as (obviously) trying to get to details of Constructor Theory and Marletto’s *Counterfactual* take on fundamental physics, he chooses to start from the angle of why would a young physicist embark on a new topic that overturns the whole of the most widely accepted aspects of modern physics? Isn’t that over-ambitious? Surely most critics and interlocutors must come at her with questions of – Where’s the problem? If it ain’t broke what are you trying to fix? – rather than taking any details of her (and Deutsch’s) alternative theory seriously.

Unabashed, Marletto is pretty clear – in paraphrase:

It will prove to be the case that “Quantum Theory is not up to the job” of describing all of nature.

As conceived by its originators “Quantum Theory was only ever a work in progress” never intended to describe everything.

Information-theoretic aspects of Quantum Theory will turn out to be fundamentally true

Philosophically, I’m already wedded to information-theoretic fundamentals, so I’m obviously willing her every success.

As someone old enough to be her granddad, I’m also glad such a young researcher has taken up the challenge.

[*Beyond that it’s a very good interview by Carroll. Marletto responds to most of them with yes, that’s a good / fair / relevant question. Could learn a fair bit about Constructor Theory from the interview*.]

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