It doesn't matter how many times you showed that it invented assembly instructions or wxwidgets functions, they insist on cheating. I even told them the analogy of going to the gym: you lift with your own strength, you don't use a crane.
And of course, it is evident when you receive students that don't know what is a function or that cannot complete simple exercises during a written test.
We learned by reading, lots of trial and failing, curiosity, asking around, building a minimal reproducible bug for stackoverflow... they (the ones that rely only on chatgpt and not their brain) cannot even formulate a question by themselves.