<div dir="ltr">Folks --<div><br></div><div>Most of us Sci-Fi fans have little trouble with time-travel stories in which the past is changed, and consequently "the present".</div><div>In these scenarios, when the time-travelers return to "the present", they find that no one is aware of any change, even if it is radical.</div><div><br></div><div>I theorize that the inverse might also be true. I find that most folks presume that the Past is "Real", that since it has a recorded historical record, if only in our memory, then it somehow still exists. Likewise we define the Future as "hasn't happened yet", and so it has no existence, save in "Works of Fiction". <br>And yet we can imagine with certainty future consequences of current actions (like jumping off a cliff), even though they have not yet happened.</div><div><br></div><div>WHAT IF like Einstein we play a thought-experiment and discard the notion of linear-time, at least in the sense of Past-vs-Future being different, and instead define them both as projections from the Not-Now. In this theory, the only reality is the Here-Now, and both past and future are cause-effect or effect-cause projections. Thus when we take action in the Here-Now, both Past and Future are altered.? Nearly all of us readily accept the idea that the Future can be changed by current actions, and by the common concept of linear time find it absurd that the Past can be altered. But suppose it could happen that way. How would this change our concept of time, of history, of fate?</div><div><br></div><div>The physicists reading this would scream about cause-effect, relativistic light-cones, conservation of energy, entropy, etc.</div><div><br></div><div>But no one raises these same complaints when radical quantum-theory talks about "The Multiverse" (which I find absurd).</div><div><br></div><div>Ah, vot-der-hell, maybe several beers will clear my mind of these crazed ideas.</div><div><br></div><div>-- Uncle Ersatz</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div> <br><br><br><br><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 16 Oct 2024 at 20:57, pt <<a href="mailto:mnemotronic@gmail.com">mnemotronic@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Official Joe's Spoon Reflector.<br>
<br>
All your base are belong to us. You are on the way to destruction.<br>
You have no chance to survive make your time. HA HA HA HA...<br>
For great justice.<br>
<br>
<div dir="auto"><div>In essence, therefore, we experience time because of the interplay
between our computational boundedness as observers, and the
computational irreducibility of underlying processes in the universe. If
we were not computationally bounded, we could “perceive the whole of
the future in one gulp” and we wouldn’t need a notion of time at all.
And if there wasn’t underlying computational irreducibility there
wouldn’t be the kind of “progressive revealing of the future” that we
associate with our experience of time.<br></div><div dir="auto"><br></div><div dir="auto"><br></div><div><a href="https://writings.stephenwolfram.com/2024/10/on-the-nature-of-time/" target="_blank">https://writings.stephenwolfram.com/2024/10/on-the-nature-of-time/</a><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div>Please wash your hands after handling this mail. Thanks! </div></div>
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