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#41
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Wesley Clark Support Warp Drive, Time Travel
TKalbfus wrote:
But this is making a rather special connection between ligh cones and time, which need not really be the case. Unlike space, time clearly has a prefered direction. Perhaps we only see that portion that is consistent with our own existance, this is a version of the anthopomophic principle. The Universe allows for the existance of life, because otherwise we could not observe it. Time Travel is impossible from our perspective for similar reasons. We cannot go back and change our own history. If we create another timeline we cannot go back and prove we have done so since the Universe will have changed. The skeptics left behind in the original universe will therefore remain skeptical as no time traveller back into history has ever appeared in the history books. Tom But if they're present at the use of the device, they *will* observe the traveller simply disappear from *this* timeline/universe. And if it's doing what its supposed to do, then any attempt to detect fraud should fail. (Okay, it may not precisely prove time travel, but it'll be clear that the guy went *somewhere*) |
#42
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Wesley Clark Support Warp Drive, Time Travel
Are you guys seriously trashing Clark because he is not sufficiently
good at being a politician? Please, if you want good politicians, that's what you will get. |
#43
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Wesley Clark Support Warp Drive, Time Travel
But if they're present at the use of the device, they *will* observe
the traveller simply disappear from *this* timeline/universe. And if it's doing what its supposed to do, then any attempt to detect fraud should fail. (Okay, it may not precisely prove time travel, but it'll be clear that the guy went *somewhere*) Yeah and if someone falls into a black hole they disappear too. If a time traveler suddenly appeared in out universe, that may be something else, he may know a few things about the present and the immediate future to be convincing. History is in part decided by the historical actors, they have plans and agendas that they will continue to pursue whether a time traveler from the future appears or not, but I think history according to the time traveller will quickly go off track as random occurances and changes in the weather alter plans. People will die when they are not supposed to and go on living past when they should have died. Tom |
#44
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Wesley Clark Support Warp Drive, Time Travel
Lets review:
There are three types of FTL speeds Superluminal, Infinite, and ultraluminal. each velocity is relative to a specific subluminal velocity such as the velocity of the Earth. If you take the velocity of Earth and express it as a fraction of the velocity of light, the multiplicative reciprical of that fraction is an infinite relative to Earth. To another observer the Earth could have a velocity of 1 km/sec. The speed of light is 300,000 km/sec so as a fraction the Earth's velocity is 1/300,000 c. An infinite velocity for Earth, according to the observer would then be 300,000c or 300,000 times the speed of light, this is not infinite to the observer, but it is to people standing on Earth. If an object is going slower than 300,000 c in relation to the observer, it will travel forward in time in relation to Earth (this is superluminal). If it is traveling at 300,000c, no time will elapse on Earth (this is infinite for Earth). If the object is traveling faster than 300,000 c according to the observer, that object will be traveling into Earth's past if it ends up there. (this is ultraluminal). The observer will see a version of Earth's history where the time traveler meddles, but he will never see the future where he came from. You can only see the time traveller arrive or depart, but never both. Tom |
#45
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Wesley Clark Support Warp Drive, Time Travel
Scott Lowther wrote in message ...
Geoffrey A. Landis wrote: Bill Clinton had the somewhat unusual policy of being socially liberal and fiscally conservative. Fiscally conservative? Correct. A seemingly odd combination, socially liberal and fiscally extremely conservative. As a candidate, he was the only Democrat in favor of North American Free Trade. He went into office promising to shrink the government, cut government spending, reduce the deficit. His 96 state of the union address declared the end of the era of big government. He deregulated energy and telecommunications. Quoting documents from the time: The federal budget proposal released by the Clinton administration February 1 is a thoroughly business-oriented document that reserves virtually all new spending for the military, as well as reducing the federal debt and bolstering the Social Security and Medicare Trust funds, with little or nothing to meet a myriad of urgent social needs. In terms of financial policy, he was extremely conservative. His HillaryCare would have taken over something like seven percent of GDP for Da Gubmint. That's the part where I said "socially liberal". Only the fact of the "Republican Revolution" in '94, when the Repubs finally had the balls and the numbers to stand up to the Dems, And *increase* government spending. Ignore the ideology: look at the numbers. prevented the Clintons from totally trashing the economy through even *more* massive tax increases. Sorry, unsubstantiated. The budget surplus was a result of the Repubs stopping the Clinton tax-and-spend spree. Instead, they went on a "don't tax but increase spending" spree. Cutting taxes without correspondingly cutting spending isn't actually a tax cut, of course-- it's a tax deferment. Since the second world war, Republican administrations have NEVER cut the deficit. Never. Look at the data. Every single Republican administration has had a higher deficit rate leaving office than entering office. As I said, policy wise, Clinton was very odd; socially liberal and fiscally conservative. The current budget defecits are a result of Repubs acting like Dems, and havign a weiner of a Repub President who's also acting like a Dem... The current budget deficits are the result of people in office who are socially conservative, but financially liberal (protectionism in the steel industry, increased government spending, subsidies for farming, timber, export, and mining, large pork-barrel spending in the budget bills). -- Geoffrey A. Landis http://www.sff.net/people/geoffrey.landis |
#46
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Wesley Clark Support Warp Drive, Time Travel
TKalbfus wrote:
But this is making a rather special connection between ligh cones and time, which need not really be the case. Unlike space, time clearly has a prefered direction. Perhaps we only see that portion that is consistent with our own existance, this is a version of the anthopomophic principle. The Universe allows for the existance of life, because otherwise we could not observe it. I don't think the universe cares if it is observed or not. It can perfectly well observe itself. Time Travel is impossible from our perspective for similar reasons. We cannot go back and change our own history. If we create another timeline we cannot go back and prove we have done so since the Universe will have changed. The skeptics left behind in the original universe will therefore remain skeptical as no time traveller back into history has ever appeared in the history books. But this is only so if there are multiple timelines. There need not be. Tom -- Sander +++ Out of cheese error +++ |
#47
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Wesley Clark Support Warp Drive, Time Travel
Scott Lowther wrote: The budget surplus was a result of the Repubs stopping the Clinton tax-and-spend spree. okaaay. . . The current budget defecits are a result of Repubs acting like Dems, and having a weiner of a Repub President who's also acting like a Dem... Wait. Aren't these the same repubs who stopped the Clinton spending spree? Why are they all of a sudden acting so differently? Seems like a Jekyll and Hyde syndrome. Face it. Fiscal responsibility isn't a Republican trait. Oh wait . . . Tricky Dick did have the balls to ax those damned expensive Saturns. Hop http://clowder.net/hop/index.html |
#48
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Wesley Clark Support Warp Drive, Time Travel
Peter Fairbrother wrote: Alain Fournier wrote That's not time travel as I see it. Time travel is coming back to _here_ before you left (or perhaps after, but no-one doubts that the latter is possible). Anything else doesn't count (and probably doesn't violate causality). Travelling faster than light does mean arriving here before you left. Imagine two ships going to Alpha Centauri and back, both ships start there voyage at the same time. Ship A travels at the speed of light and ship B travels faster than ship A, therefore ship B arrives back on Earth before ship A. Relativity tells us that clocks slow down with increased speed until clocks completely stop at the speed of light. So for people on ship A the trip back and forth took zero seconds (of their on board time), but people on ship B arrived before them so they must of made the trip in less than zero seconds as measured by the clocks on board ship A. I got this far.. Which means that people on Ship A see people on Ship B arriving before they left. But I don't follow that. Do you mean ship A, on arrival at Earth, sees ship B arriving at Earth before ship B left? Ship A wouldn't see that. They don't see ship B arrive at all. But they do have evidence that it has been there for a long time. At the exact time of the departure of ship B, people from ship A see that people from ship B had enough time to sell the goods they brought back from Alpha Centauri, invest the procedes and earn interest on those proceeds. They don't see people from ship B arriving but they notice that they have changed timeline. The world they see isn't consistent with being zero seconds after the departure of ship B. People on ship A don't see people on ship B arriving because you don't see anything while travelling at the speed of light. If people on ship A would travel just a touch slower than the speed of light then yes they would see people on ship B arriving before they left and they would try to figure out what would happen if someone who has arrived on ship B would go and kill the himself which hasn't yet left. When ship A arrives back on Earth, 8 years have passed on Earth. Lots of things could have happened on Earth, in what seems like no time to ship A. Including the departure and arrival of many ships, which need not have gone FTL. Special relativity measurements should be made from inertial frames anyway. And ship A is most definitely not in an inertial frame! Even if you accelerate, people shouldn't have the possibility to shake hands with a past replica of themselves. Another way of seeing this is that for a person on a ship travelling at the speed of light, his speed is infinite. His clocks have stopped and he can reach a point at any distance in no time according to his watch. If you can travel a large distance in zero seconds wouldn't you say that your speed is infinite. So if at the speed of light you reach your destination exactly at the same time as when you left, wouldn't you reach your destination earlier if you went faster? The light speed traveller also has infinite speed from an energy point of view, his mass has shifted to infinity and he had to spend an infinity of energy to reach that speed. The speed of light is also an infinite speed from the perspective of how far one is from reaching the speed of light. If you travel at 99.9999% of the speed of light and want to know how much more you have to accelerate to reach the speed of light you will notice that you must increase your speed by exactly the speed of light to reach it. Going very fast doesn't get you any closer to the speed of light. Just like going very fast doesn't get you any closer that an infinite speed. So asking if it is possible to go faster than the speed of light is like asking if it is possible to go faster than an infinite speed. The answer is yes, if you can travel back in time and no if you can't. Alain Fournier |
#49
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Wesley Clark Support Warp Drive, Time Travel
Explorer8939 wrote:
Are you guys seriously trashing Clark because he is not sufficiently good at being a politician? I don't speak for others, but that's what I'm doing in this particular instance. Please, if you want good politicians, that's what you will get. I *always* want good politicians. I don't, however, always get them. Partly from the lack of a universal agreement on what constitutes 'good.' Partly because being an effective campaigner doesn't always translate into being good in office. |
#50
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Wesley Clark Support Warp Drive, Time Travel
Geoffrey A. Landis wrote:
His 96 state of the union address declared the end of the era of big government. Perhaps the biggest, boldest, baldest lie in US political history. His HillaryCare would have taken over something like seven percent of GDP for Da Gubmint. That's the part where I said "socially liberal". That's also not Fiscally Conservative. Taking over large portions of the GDP for *any* purpose ain't FC. Only the fact of the "Republican Revolution" in '94, when the Repubs finally had the balls and the numbers to stand up to the Dems, And *increase* government spending. But they fought down increased taxation. While it's Not Good that Repubs are also spending whores, at least they're not as bad tax whores. prevented the Clintons from totally trashing the economy through even *more* massive tax increases. Sorry, unsubstantiated. Clinton's 1993 tax increase. As memory serves it was the US's largest to that date. Instead, they went on a "don't tax but increase spending" spree. Cutting taxes without correspondingly cutting spending isn't actually a tax cut, of course-- it's a tax deferment. Cutting taxes can be a way of increasing revenue, not decreasing revenue. Just as increasing taxes is a way of decreasing revenue, as California is finding out. -- Scott Lowther, Engineer Remove the obvious (capitalized) anti-spam gibberish from the reply-to e-mail address |
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