If people are genuinely a fraud they won't be able to talk about the code in a sensible manner. I didn't write the monstrosity that I am working on just now, b

If people are genuinely a fraud they won't be able to talk about the code in a sensible manner. I didn't write the monstrosity that I am working on just now, but I could explain how it works and I know where to look to fix bugs. I don't know why some crappy design decisions were made. Does that make me a worse programmer than if I had written it myself? Is harder to understand someone else's code than stuff you have written yourself. There are far more jobs working on existing code bases than on new new projects. (My guess is that you have never worked with anyone who has claimed ownership of someone else's code, have you?)