3 ms·
One of them claim made is that time is real and fundamental. I think SR and GR teaches us that the fundamental concept is causality.
by pierrebai 9y ago
One of them claim made is that time is real and fundamental. I think SR and GR teaches us that the fundamental concept is causality.
- anigbrowl 9y agoBut causality is inherently temporal. If we imagine a cosmic pause button, it is only because of the passage of time that there can be a causal relationship between my dropping this teacup and its smashing on the floor. If I hit pause half-way there we can talk about how much potential and kinetic energy it has and so on, but (since the rest of the universe is paused) nothing we day can affect anything so no causal relationships can exist until we let things run again.