When you define some concepts, those definitions and concepts should help you better understand and simplify the descriptions of things. That's the point of definitions and terminology. You are not achieving this goal, quite the opposite in fact, your description is confusing and would never actually be useful in understanding, debugging, or writing software.
Stated another way: if we just didn't talk about concurrent vs parallel we would have exactly the same level of understanding of the actual details of what code is doing, and we would have exactly the same level of understanding about the theory of what is going on. It's trying to impose two categories that just don't cleanly line up with any real system, and it's trying to create definitions that just aren't natural in any real system.
Parallel vs concurrent is a bad and useless thing to talk about. It's a waste of time. It's much more useful to talk about what operations in a system can overlap each other in time and which operations cannot overlap each other in time. The ability to overlap in time might be due to technical limitations (python GIL), system limitations (single core processor) or it might be intentional (explicit locking), but that is the actual thing you need to understand, and parallel vs concurrent just gives absolutely no information or insights whatsoever.
Here's how I know I'm right about this: Take any actual existing software or programming language or library or whatever, and describe it as parallel or concurrent, and then give the extra details about it that isn't captured in "parallel" and "concurrent". Then go back and remove any mention of "parallel" and "concurrent" and you will see that everything you need to know is still there, removing those terms didn't actually remove any information content.
Addition vs multiplication is a bad and useless thing to talk about. It's a waste of time. It's much more useful to talk about what number you get at the end. You might get that number from adding once, or twice, or even more times, but that final number is the actual thing you need to understand and "addition vs multiplication" just gives absolutely no information or insights whatsoever.
They're just different names for different things. Not caring that they're different things makes communication difficult. Why do that to people you intend to communicate with?
Stated another way: if we just didn't talk about concurrent vs parallel we would have exactly the same level of understanding of the actual details of what code is doing, and we would have exactly the same level of understanding about the theory of what is going on. It's trying to impose two categories that just don't cleanly line up with any real system, and it's trying to create definitions that just aren't natural in any real system.
Parallel vs concurrent is a bad and useless thing to talk about. It's a waste of time. It's much more useful to talk about what operations in a system can overlap each other in time and which operations cannot overlap each other in time. The ability to overlap in time might be due to technical limitations (python GIL), system limitations (single core processor) or it might be intentional (explicit locking), but that is the actual thing you need to understand, and parallel vs concurrent just gives absolutely no information or insights whatsoever.
Here's how I know I'm right about this: Take any actual existing software or programming language or library or whatever, and describe it as parallel or concurrent, and then give the extra details about it that isn't captured in "parallel" and "concurrent". Then go back and remove any mention of "parallel" and "concurrent" and you will see that everything you need to know is still there, removing those terms didn't actually remove any information content.