I often don't know what's wrong with my broken code. I only know what I want, not exactly in what way I failed to produce it. I have to debug to figure that out

I often don't know what's wrong with my broken code. I only know what I want, not exactly in what way I failed to produce it. I have to debug to figure that out. I grant, maybe that is still quite different. There is something extra to grasp the theory behind someone else's code sometimes.