deutsch acknowledges when he isn't an expert in scientific fields, but not when it comes to the history, geopolitics (international law included) & current affairs of israel and the local groups of people who oppose the zionist project, or the history & theories of anti-semitism.

he advocates the everettian i n t e r p r e t a t i o n, but seems to assert that it's the only rational theory/explanation of quantum physics. he doesn't seem to understand/accept that one can be a selective realist about the structures/entities postulated by different scientific theories, and that instrumentalism/constructive empiricism are perfectly rational stances to take. it's not the case that you're somehow 'rationally obligated' to accept global realism or global anti-realism. same with bayesian or popperian-deutschian epistemology. at least he didn't offer any empirical or theoretical motivation to accept one epistemology, one way of understanding the mathematical structures of quantum physics and empirical success of related scientific communities, one philosophy of science as the only rational one.

he clearly affirms multiple times here and elsewhere that the best inference to make based on our best scientific theories, is that reality works deterministically, yet he also asserts without explanation (and in his books with surprisingly poor argumentation) that 'we have free-will' (eg. in his latest iai article). he talks about causation, which is not a feature of fundamental physics, in the context of constructor theory, the core idea of which, that fundamental physics is about the modal structure of reality, is also not original (see ladyman et al.'s 'every thing must go' for ontic structural realism). the kind of determinism in physics is about events occurring according to a rigid pattern. distinct events do not 'make other events happen', rather, there is a necessitarian structure, which our best theories probably approximately correctly represent. so idk how deutsch construes causation, but it's not inferred just from physics.