Technical equipment, user, not quite so.
Back around the turn of the millennium, a regular customer called to report a dead printer. Job duly handed to me as the local techie. Call customer for the usual pre-visit checks and talk to the insurance firm's IT manager.
Machine dead, "Have you confirmed it's correctly plugged in ?"
"Of course I have" she barks down phone...
"No problem, I'll be in tomorrow morning first thing with a new power supply"
next day, arrive, escorted to machine, glance at machine, test with power switch (proper hard switch, no soft switches then), dead . . check power lead firmly inserted, yep, trace cable back to socket, turn on switch on socket - machine whirs into life.
Never again did she doubt me and answer a query without going to double check.