Last night I was out buying something that was priced $9.99. I asked the cashier for $40 cash back. Now, logically, doesn't your mind think "hmmm... that's $10 plus $40 so $50 should be the total, plus a bit for tax."
Instead she handed me the keypad to punch in my PIN, and the total read $31. She had subtracted the purchase price from my cash back. When I first saw the price I said to her, "$31? But, I asked for $40 cash back"
Her look was completely blank. Or not so much blank as, "But that's what I gave you" In fact she did try to explain that that was what I was getting.
Sweet Mary, mother of god, we are all getting too reliant on machines. It took over five minutes for the supervisor to come and void the transaction and for the girl to run it all through again. She wasn't a stupid girl. She seemed quite bright, but quite frankly, this is the sort of mistake that NO person in high school should be making, no matter what their intelligence level. She just wasn't used to using her mind so that when she had entered the numbers incorrectly into the cash, she couldn't see that it literally didn't add up.
I was reading somewhere that we need to start using our minds more for simple memory in order to stay sharp. The article recommended memorizing phone numbers. It's true that I have no clue [apart from my parents' number] what anyone's phone number is. They are all programmed into my cell phone. Machines are great, but in some ways they are dumbing us down as a society.