Dear Gabriele Carcassi,
Wonderful simple essay as a dialogue form !!, Uncomputability is not only just non-terminating infinite loop of calculations, but also those physical situations where it is not possible to fit a mathematical function to some physical happenings, what do you say?
Some of your beautiful dialogues.........
B: I understand now. You can separate what is physically relevant from athematical junk.
C: That's a rather harsh term... Time and time again, what was seen as mathematical junk turned out to be useful to physics later
B: And a lot of it didn't ..............
..... is extremely correct, Physicists are searching for mathematical singularities in Physical universe!!!
In my essay "A properly deciding, Computing and Predicting new theory's Philosophy" I discussed much similar concepts in a different way....