Here’s the way I understand it: A low-entropy state takes fewer bits to describe, and a high-entropy state takes more. Therefore, a high-entropy state can contain a description of a low-entropy state, but not vice-versa. This means that memories of the state of the universe can only point in the direction of decreasing entropy, i.e. into the past.
Here’s the way I understand it: A low-entropy state takes fewer bits to describe, and a high-entropy state takes more. Therefore, a high-entropy state can contain a description of a low-entropy state, but not vice-versa. This means that memories of the state of the universe can only point in the direction of decreasing entropy, i.e. into the past.