There is a little bit of truth to it - knowing how maths works helps you get a feel for if the answer is "about right" - which helps you avoid orders of magnitude mistakes. But doing it by hand makes it more likely that you'll make small mistakes.
Yes. Everyone who lives will die. However spending on the NHS (or any health spending) is intended to ensure that people have the greatest number of quality days before they die, not just to extend life at all costs.
That's assuming that the messages are even being sent from Google in the first place. Spammers often use a network of compromised computers to send messages that have a faked sender address. Google would only be seeing the replies coming in, not the original emails going out.
Based on this post in another thread:
Given the number of places that don't accept Amex what, in this day and age, is the appeal of Amex? Why would anyone prefer to use Amex rather than Visa or Mastercard branded cards?
You've read it wrong. The OP said:
Important point is that the message on the machine doesn't say that it will never accept cash, just that it has displayed that message when the OP has tried to use it. Further, the fact that they say:
indicates that they know it is possible to pay using...