“If you plot perceived value on a graph, with the horizontal axis as time and the present as zero, then you will see the line representing value curve sharply upward the closer it comes to the zero point, reaching its zenith as it hits the vertical axis. By comparison, value in the far future goes low quickly, changing hardly at all between a year and two years distant. A hyperbola. When humans and most living creatures consider the value of something, they tend to see its future value diminish hyperbolically. In other words, our system of evaluation isn't exponentioally logical, it's hyperbolically illogical.”