A web developer can potentially understand and troubleshoot issues in software outside their primary expertise, such as an office program, but success largely depends on their knowledge, experience, and the specific programming language involved. While a web developer may not be able to fix a bug directly, they often possess analytical skills that allow them to identify problems effectively. The discussion highlights that familiarity with various programming languages and concepts is beneficial, as many languages share common logical structures. However, the ability to learn and adapt is crucial, especially when dealing with unfamiliar code. Access to source code is typically necessary for actual fixes, particularly in proprietary software like Microsoft Office, which is closed source. Overall, while a web developer may not be equipped to resolve every issue, their foundational skills in programming and problem-solving can aid in diagnosing and reporting bugs.