# weak Church-Turing thesis

(weak) Church-Turing thesis states every physically realizable computation device can be simulated by a Turing machine (not necessarily efficiently). (1) Then Does any model that is not physically realizable and cannot be simulated by Turing machine? (2) Is there any evidence for this thesis?

• As a corollary it implies that every physical process can be modeled by a turing machine. I don't think we've discovered one that cannot. Aug 2 '17 at 10:51