It reminds me of the orange juice test. You organize an annual convention for hundreds of people.

You tell the banquet manager of the hotel you are considering that the morning breakfast must include a large glass of freshly squeezed orange juice for everyone of the attendees. It must be squeezed no more than two hours before the breakfast.

It is not possible to do so. Squeezing that much orange in much a short amount of time would be prohibitively expensive.

If the manager says yes he is either lying or incompetent and you'd better find someone else who will tell you it's not possible.