About physics.
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Tauhid
Scientists and philosophers call this the psychological arrow of time. Hot coffee left on your desk cools down, and never heats up on its own, which reflects the thermodynamic arrow of time. … Therefore, almost any complex arrangement of matter will gain entropy no matter which direction time flows
AM Nabil
It’s all about entropy. Though in microscopic physics, time is treated as directionally neutral–it doesn’t matter which direction it’s going–the Second Law of Thermodynamics explains why time moves forward only in our visible world.