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Is Time Travel (going backwards) Possible?
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<blockquote data-quote="Umbran" data-source="post: 6042584" data-attributes="member: 177"><p>My opening note is very simple - I am making zero effort to ridicule anyone or anything. I am, as usual, concerned about scientific accuracy, not in making anyone look foolish. Until you understand that, we aren't going to get very far.</p><p></p><p>I was giving you the benefit of my doubts, yes. </p><p></p><p>We were talking about scholars and scientists, and their behavior. I took it to mean that your "prevailing view" in context meant "prevailing among scholars". You brought up Flat Earth as a demonstration of those who *should* have known better sticking to an outmoded theory. Given that there's a known and documented case in American education where folks we actively taught that example, you should by no means be surprised my mind went there.</p><p></p><p>I, personally, don't fault anyone who doesn't have the necessary tools for not knowing a thing. Development of the math to show the Earth is round coincided with (and is generally required for) the building of those towers and masts you mentioned, tall enough to regularly observe the phenomenon. Which is why Pythagoras and Aristotle worked out the round Earth, as you would say, thousands of years ago.</p><p></p><p>So, can you demonstrate that those who *should* have known the Earth was round frequently stuck to Flat Earth? If not, then Flat Earth is not really relevant to our discussion. Except...</p><p></p><p>"Dark matter," is exactly analogous to, "look at masts coming over the horizon, and figure out the world is round." You look at galaxies - you can estimate the amount of mass that's visible. You can also measure their motions. As Freyar noted, the two don't match.</p><p></p><p>That there's extra mass that you cannot see at intergalactic distances (thus "dark" or "missing") is the absolute simplest explanation for the observed phenomenon. And it is hardly a leap, given that we all live on a chunk of matter that would be "dark" in that sense. </p><p></p><p>If you figure anyone who can climb a mountain should guess that the world is round, you should also figure that anyone who can measure the motion of galaxies should figure there's mass present that we cannot see.</p></blockquote><p></p>
[QUOTE="Umbran, post: 6042584, member: 177"] My opening note is very simple - I am making zero effort to ridicule anyone or anything. I am, as usual, concerned about scientific accuracy, not in making anyone look foolish. Until you understand that, we aren't going to get very far. I was giving you the benefit of my doubts, yes. We were talking about scholars and scientists, and their behavior. I took it to mean that your "prevailing view" in context meant "prevailing among scholars". You brought up Flat Earth as a demonstration of those who *should* have known better sticking to an outmoded theory. Given that there's a known and documented case in American education where folks we actively taught that example, you should by no means be surprised my mind went there. I, personally, don't fault anyone who doesn't have the necessary tools for not knowing a thing. Development of the math to show the Earth is round coincided with (and is generally required for) the building of those towers and masts you mentioned, tall enough to regularly observe the phenomenon. Which is why Pythagoras and Aristotle worked out the round Earth, as you would say, thousands of years ago. So, can you demonstrate that those who *should* have known the Earth was round frequently stuck to Flat Earth? If not, then Flat Earth is not really relevant to our discussion. Except... "Dark matter," is exactly analogous to, "look at masts coming over the horizon, and figure out the world is round." You look at galaxies - you can estimate the amount of mass that's visible. You can also measure their motions. As Freyar noted, the two don't match. That there's extra mass that you cannot see at intergalactic distances (thus "dark" or "missing") is the absolute simplest explanation for the observed phenomenon. And it is hardly a leap, given that we all live on a chunk of matter that would be "dark" in that sense. If you figure anyone who can climb a mountain should guess that the world is round, you should also figure that anyone who can measure the motion of galaxies should figure there's mass present that we cannot see. [/QUOTE]
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