Spatially separated events are time relative but .

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In the discussion on spatially separated events and their time relativity, participants explore the implications of Einstein's relativity of simultaneity, emphasizing that while two events can appear simultaneous to one observer, their order may differ for another observer due to the finite speed of light. The distinction between causally connected and disconnected events is clarified, highlighting that causally disconnected events cannot influence each other, regardless of their spatial separation. The conversation also touches on the philosophical implications of time perception in a four-dimensional block universe, questioning the nature of causality and the ordering of events. Participants express discomfort with the idea that not all events are ordered in a cause-effect relationship, reflecting on the challenge of reconciling intuitive notions of time with relativistic principles. Ultimately, the discussion underscores the complexity of understanding time and causality within the framework of modern physics.
  • #31
Pleonasm said:
A psychic informes me that a specific Sofie will marry me after he tells me this - A. Prompting me to get curious, contact a specific Sofie - B. Sofie proposes to me and we get married ( I fall in love over the phone) - C.

A is not connected to C?

If the time between A and C was a year (for you) then A is causally connected to all within a light year of A at the time of C, everything outside that distance at that moment is "elsewhere".
 
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  • #32
Pleonasm said:
I guess we will find out. He did write: "is not transitive" instead of "not neccesarily".
That is correct, the relationship is not transitive. Here is a brief introduction about what it means for a relationship to be transitive: http://en.wikipedia.org/wiki/Transitive_relation

You are thinking of antitransitivity which is a stronger statement: http://en.wikipedia.org/wiki/Intransitivity

Causality is not transitive, but it is not antitransitive. I was not claiming antitransitivity.

If you are given only that A is causally connected to B and B is causally connected to C then you do not have enough information to determine if there is a causal connection between A and C. For instance, the causal connection could be that A caused B and B caused C, in which case A would be causally connected to C. But the causal connection could be that A was caused by B and C was caused by B, in which case A might not be causally connected to C.

This is relevant because it shows the problem with this argument:
Pleonasm said:
if you at the same time take the view of causality being a fact since the beginning of universe, entailing that all events are by necessity causally connected to each other
This argument relies on causality being a transitive relationship. You are claiming that every event is causally connected to the big bang, and therefore causally connected to each other. But this only works if "causally connected" is a transitive relationship, which it is not.
 
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