Many people in computer labs will assure

you, beyond a shadow of a doubt, that they were doing everything

correctly, and it still wasn’t working, only to make you get up from your
nice
comfy seat to walk over to the other side of the room and do
it
yourself. Invariably, after it works the first time for you, the
response is,
“THAT’S WHAT I TYPED THE FIRST TIME!” Obviously
not.