You know those teleprompters that are a mirror
showing the reflected image from a monitor?
The letters on the monitor have to be backwards for it to work.
Several years ago a guy walks into my modest one-man
computer shop with a replacement LCD meant for a notebook PC.
He asked me to build a teleprompter for him!
He wanted me to build an LCD monitor from scratch, using the
one part he supplied, but with a normal/flip image switch.
If I could do THAT, I wouldn't be in a one-man computer shop!
I told him it was not a service that I offered.
Back in my days as a secretary for a big (blue) computer company, I found myself explaining - or trying to, anyway - how to print out a confirmation page from the new conference room reservation system to another, somewhat clueless, secretary.
Her: What am I supposed to do? It like doesn't have the file thing on top or anything.
Me: Hit Control-P. That should bring up the print dialog box.
Her: It doesn't have any word things on it. Just the screen.
Me: On the keyboard.
Her: What board? It's just the screen thingy!
Me: On the---
Her: You're not helping me! Where on the screen thingy?! There's nothing there!
Me (louder than I intended): Not on the screen! The keyboard! P ON THE KEYBOARD! Wait-- (I look around at one of the managers I supported, who was over at the copier ten feet away laughing his head off) Pete, what's so funny?
Sometimes, context is everything...