An old man lies dying in 2070 surrounded by his family. 

Trying to extract some final wisdom from him and keep him company in his final days, his son asks, "What's the part of your life that sticks out to you the most, Dad?" 

He responds, "I can perfectly remember my youth. Those summer days fifty years ago seem, in my mind, to be as clear and perfect as this moment now."

His son exclaims, "Wow, fifty years! Your memory was always so impressive, even in your old age, Pop."

"But of course," says his dad, "hindsight is 2020."