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Causality
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Causality and time travel are mortal enemies. It was once thought that breaking causality through the use of time travel would cause a paradox that would destroy all of reality. Further research seemed to show that paradoxes just cause relatively minor disruptions, which reality can eventually repair. This was ... false. The truth is somewhere in between - some damage is repaired, but repeated breaking of causality results in more and more nonsense. Eventually events will become so scrambled that things will happen for absolutely no reason.
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Causality is the faculty which houses the ability to abstract, think logically, and to trace cause and effect. Causality is looking for the "How?" and the "Why?" and searches for reasonable answers. It gives the ability to understand principles and to investigate theories and philosophies. A strongly developed Causality is the hallmark of thinkers, scientists and philosophers.
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Causality leads to the vicious chain of cause and effect. For each cause is ... an effect. Also the effect is totally different from the cause. Things and effects are usually so full of art and beneficial purposes that let alone their simple immediate causes, even if all causes gathered they would be unable to produce one single thing.
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Causality generates directed or focused change. Within matter, change due to relative objectivity relates to space and time (for example : velocity, position). Within consciousness, such change represents social learning. The kind of change produced by cause is external.
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Causality is hard to interpret to ordinary language from many different physical theories. One problem is typified by the moon's gravity. It isn't accurate to say, "the moon exerts a gravitic pull and then the tides rise." In Newtonian mechanics gravity, rather, is a law expressing a constant observable relationship among masses, and the movement of the tides is an example of that relationship. There are no discrete events or "pulls" that can be said to precede the rising of tides. Interpreting gravity causally is even more complicated in general relativity.
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Causality is different from change, and yet they are related to each other. Change can occur either before cause or after it. Change can generate causality, and causality can generate change. In the world of the atom, some events are the result of change, and some are the result of causality.
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Causality