An economic experiment

  1. Find a three-year-old.
  2. Measure the emotional state of the three-year-old.
  3. Give the three-year-old an icecream.
  4. Re-measure the emotional state.
  5. Snatch away the icecream before they have had a chance to start eating it.
  6. Re-measure the emotional state – is it equal to that measured at (2.)?
  7. Give the three-year-old its icecream back.
  8. Re-measure the emotional state – is it equal to that measured at (4.)?