The most basic thing we know may be a new and unknown thing for others.
You never know what others do not know unless you start talking about it.
Just the other month, my wife’s younger brother had difficulty with his laptop’s hard disk. It kept saying “disk device not found”. A quick google search told me that the connectors for the disk and the board might be at fault. I told him that he need to check the connections, probably pop the laptop open and push in the connecting ribbons to make sure that nothing was knocked loose.