"The Sense of an Ending" is a good book (then movie) with this theme (although in the opposite way) https://en.wikipedia.org/wiki/The_Sense_of_an_Ending https:

"The Sense of an Ending" is a good book (then movie) with this theme (although in the opposite way) https://en.wikipedia.org/wiki/The_Sense_of_an_Ending https://en.wikipedia.org/wiki/The_Sense_of_an_Ending