Q: The screen says YES but my wifi isn't working?
A: You are reading this. Which means you either have internet, or you are experiencing a highly specific, localized hallucination. Check your router cache just in case.
Q: Who is Gary from IT, and why can he decide if I have internet?
A: Gary dictates your latency. He could route all your packets through a server in Antarctica, but moving his mouse is too much effort. Be grateful.
Q: What if the site says NO?
A: If it miraculously says NO, how are you loading this webpage to begin with? Reality might be breaking down. Checkmate, atheists.