It has happened to anyone who owns a computer. Invariably the machine hick-ups, and you find yourself on the telephone to tech support. You sit there for several hours getting routed to every customer call center on the planet trying to connect with someone who can 1 and 1 to get 2. By the end of the process, you realize that if you multiplied your hourly salary by the number of hours wasted on the phone with tech support, you could have purchased a new computer.
Since I know you’ve all been there, I won’t bore you with my HP tech support ordeal. All you need to know is that my power cord is frayed, and the morons in HP tech support keep “solving the problem” by sending me duplicate copies of some power cord that does not fit into the power adapter.
The last straw come today when I was sitting on the phone with a “case manager”, the king of the tech support morons, who apparently is a little smarter and a little mightier than his mindless minions. I guess in the land of the blind, the one-eyed man is king.
After I explained my problem for about the twelfth time, each time getting more frustrated, this “case manager” broke in and said, “according to the part numbers you gave me, you have no problem. The cord HP sent you fits the adapter you already have.”
Okay, genius. Explain to me how this peg:

fits into this hole:

At this point, I expressed to my “case manager” that I am a mechanical engineer with two advanced degrees, and I am currently employed as an engineering professor. Who else is more qualified to conclude that A does not fit into B?
The “case manger” concluded the conversation by telling me that unless I could give him some other part numbers than the ones I had read off of my computer, my adapter, and the power cord HP sent, nothing could be done to help me. So, I started reciting all the digits of Pi, and the “case manager” hung up on me.
This engineer will not be buying any more HP products.