> You can measure time based on Mars going around the Sun You can also measure it by using something non-subjective, like atomic state oscillations that are id

> You can measure time based on Mars going around the Sun You can also measure it by using something non-subjective, like atomic state oscillations that are identical anywhere in the universe. You can then use this as a counter while watching entropy increase, and see that you are moving in a single direction as those oscillations tick. That doesn't leave much room for subjectivity at all.