Before revision: Each participant will realize that a) they should take x dollars immediately if they can invest the dollar in a different venture that will yield more than y dollars n days later and b) they will be indifferent between the choices (selecting one at random) if the best available alternative will likewise yield y dollars n days later.
After revision: Both participants know that they can invest the money they receive today in a savings plan that gives them an interest of r. Both of them realize that they should take x dollars immediately if the future value of the savings plan will yield more than y dollars n days later and b) they will be indifferent between the choices (selecting one at random) if the best available alternative will likewise yield y dollars n days later.