Why is it a good idea to trade suspected bad for known good when troubleshooting a PC?

Trading suspected bad components for known good ones during PC troubleshooting is effective because it helps isolate the source of the problem quickly. By replacing a potentially faulty part with a confirmed working one, you can determine whether the issue lies with the component or elsewhere in the system. This method minimizes downtime and reduces the risk of further complications, allowing for a more efficient resolution to the problem. Additionally, it can prevent unnecessary repairs or replacements of components that are still functional.