As a software developer I promise you that software development is very much not an exact science.

Programs are complex and there are so many different ways of achieving the same thing that all code has problems and gets a bit messy in places. You can test, but it’s not easy to ensure that everything works the way it should.

The best code you’re going to get will probably be in the space industry, but even that will have bugs. The best you can do is make the code robust even when bugs make things go wrong.

In many cases copilot will do just as well as a junior developer. It’s very good at repetitive tasks and filling gaps in your existing code.