Along these lines, if we pretend there is actually a zero percent chance of curing death in our lifetime, how should we rationally act differently? Often people use the cliche ‘if you were going to die tomorrow what would you do differently today?’ as a thought experiment, seemingly implying (to me at least) that we’re already living rationally for an ~80 year lifetime and that only changes in behavior should come from learning you have a very short time to live left.
I often wonder if I too easily approximate ~80 years as infinity in my reasoning about life, and that I’m not appropriately taking into account an 80 year life span (or much shorter if you subtract sleep, how old you are now, and years of life you think you’ll be healthy enough to have control over).
TLDR: I think it’s hard to reason about spans of time that are longer than we’ve experienced but shorter than infinity, and I don’t know what to do about it.
I often wonder if I too easily approximate ~80 years as infinity in my reasoning about life
Imagine a large paper divided into 100 x 100 squares. One of those squares, most likely at the bottom part of the paper, contains an invisible mark. Every day you remove a square. When you remove the one with the invisible mark, you die.
(If you are a student, you have more expected days remaining, but you should be aware that they will be on average less useful than the ones you have now, because generally, as you grow older, you have gradually more duties and worse health. So you probably should imagine 100 x 100 days, even if you have more, to compensate for this bias.)
Too much or too little? Think about the activities and plans you were doing recently, to calibrate yourself how many squares would each of them cost. (Include the days when you were too tired or too busy to do anything useful, because those days passed too.) This gives you an idea about how much can you do. Now think about the things you did 10 years ago; how happy you are you did them; how many of them do you even remember. This gives you an idea about how you will feel 20 or 30 years later about how you spend your time now.
Along these lines, if we pretend there is actually a zero percent chance of curing death in our lifetime, how should we rationally act differently? Often people use the cliche ‘if you were going to die tomorrow what would you do differently today?’ as a thought experiment, seemingly implying (to me at least) that we’re already living rationally for an ~80 year lifetime and that only changes in behavior should come from learning you have a very short time to live left.
I often wonder if I too easily approximate ~80 years as infinity in my reasoning about life, and that I’m not appropriately taking into account an 80 year life span (or much shorter if you subtract sleep, how old you are now, and years of life you think you’ll be healthy enough to have control over).
TLDR: I think it’s hard to reason about spans of time that are longer than we’ve experienced but shorter than infinity, and I don’t know what to do about it.
Your intuitive notion of how long a year is already takes into account time lost from sleep, so you shouldn’t explicitly subtract that off.
Imagine a large paper divided into 100 x 100 squares. One of those squares, most likely at the bottom part of the paper, contains an invisible mark. Every day you remove a square. When you remove the one with the invisible mark, you die.
(If you are a student, you have more expected days remaining, but you should be aware that they will be on average less useful than the ones you have now, because generally, as you grow older, you have gradually more duties and worse health. So you probably should imagine 100 x 100 days, even if you have more, to compensate for this bias.)
Too much or too little? Think about the activities and plans you were doing recently, to calibrate yourself how many squares would each of them cost. (Include the days when you were too tired or too busy to do anything useful, because those days passed too.) This gives you an idea about how much can you do. Now think about the things you did 10 years ago; how happy you are you did them; how many of them do you even remember. This gives you an idea about how you will feel 20 or 30 years later about how you spend your time now.