Friday, 27 March 2009

On the impossibility of Time Travel!

I promised the occasional philosophical reflection on this blog. Here's one:
If I 'travel' 'back' into the past, then I am there in the past.
BUT, in my past, an older version of me wasn't present, anywhere. Therefore,
one cannot travel back into the past: for, if one travels back into the
past, IT IS NO LONGER ONE'S PAST that one is travelling back into...

8 Comments:

Blogger Rayyan said...

But what if travelling back in time in fact opens up a parallel dimension, where the past exists separately? Is there any scientific fact to that oft-repeated science fiction convention that the same material cannot co-exist in the same space (or something) so if you touch your older or younger version you explode?

27 March 2009 at 18:27  
Blogger weggis said...

You are merely playing with linguistics, and not the practicalities of the possibility.

If one travels back in time, the present becomes your past.

27 March 2009 at 22:28  
Blogger Green Gordon said...

Just as you can move through three dimensions in space, you can move through time, but as it happens, generally only at forward at the normal rate.

The word 'past' is relative to the present.

In absoulute sense, though the past is just the same place regardless of how many of you are in it. It's a bit like saying if you go to Brussels, you can't be in Brussels because you are not currently in Brussels.

(did I just repeat Weggis with far too many words?)

28 March 2009 at 10:31  
Blogger Rupert said...

Rayyan: If 'travelling back in time' opens up 'a parallel dimension', fine - but then it's not THE PAST.
The fantasy of travelling 'back' 'to 1851' [or whatever] is therefore: merely a fantasy. Any 1851 that one 'travelled back' to would not be OUR 1851 - and that is what one wanted to 'travel back' to.
All: As my deliberately laboured scare-quotes signal, the underlying problem here is the delusion that one can model travel 'through time' on travel through space. The grammar of time and of space are DIFFERENT from one another - you are all failing to recognise this. For detail, consult my book, APPLYING WITTGENSTEIN - The section on time... ;-)

29 March 2009 at 09:04  
Blogger weggis said...

Rupert,
What you seem to be saying here is that because the grammar of our language does not accommodate time travel then it is not possible. That is Bx.

Our language has developed to describe time [and space] as we have experienced it so far. If we begin to experience them in other ways then our language will have to develop to describe those phenomena, just as it has developed to describe a whole bunch of other stuff.

Wittgenstein said: “The limits of my language mean the limits of my world” He DID NOT say that we cannot find new ways to express, understand and communicate new ideas, experience and discoveries, otherwise we would not have made any technological or scientific progress at all.

29 March 2009 at 13:03  
Blogger Rupert said...

Weggis: I might just as well have said: "Because the grammar of our language does not accommodate sdlfhjdsfg, then sdlfhjdsfg is not possible". Because that is true. Because sdlfhjdsfg is nonsense. And so is time travel. What my argument proves is that it doesn't MEAN anything to talk about time travel. Just as it doesn't mean anything to talk about sdlfhjdsfg.

18 April 2009 at 21:25  
Blogger fgeegf said...

網路交友,av 女優,a圖a片,av383影音城,小高聊天室,台灣18成人,苗栗人聊天室,貼影區,正妹帶回家,18禁遊戲區,真情寫真,嘟嘟成人,台灣自拍,丁字褲美女寫真,1007視訊,裸體美女,玩弄旗袍美女遊戲,寫真集美女,777美女圖,真實自拍,台灣自拍,080聊天網,情色武俠,美腿工坊,影音部落格,aaa片免費看,0204成人片,ut女同聊天室,視訊辣妹,a片免費,人妻自拍,免費線上a片,上班族聊天室,18禁,熊貓貼圖區,aa片免費看,女優盒子,18禁區,ol美腿,777成人區,視訊美女,聊天室,自拍走光,a片試看,18禁卡通,美樂蒂情色網,台灣a片,

18禁漫畫,脫衣遊戲,免費a片觀賞,情色成人,丁字褲美女圖,視訊交友網,辣妹賓團,性愛自拍,小弟弟貼影片,潮吹影片,自拍圖貼,69成人,自拍網,線上看,家庭教師影片,免費a片線上看,正妹帶回家,聊天室入口,小莉影音像館,69成人,免費視訊辣妹,美女牆,小魔女免費影片,成人自拍,情色卡通,偷拍貼圖,線上影片,摸摸扣扣同學會聊天室,原住民聊天室,日本美女寫真集,情色聊天室,美女交友,情色成人,a片免費,影片分享,正妹日報,熊貓貼圖,美女寫真,無名強力正妹牆,性愛影片,0204 貼圖區,免費視訊辣妹脫衣秀,情色電影,兔女郎貼影區,自拍貼圖區,完美女人,熟女人影片,性愛自拍,1069交友,美眉成人排行榜,av女,本土自拍,美女桌布,

22 April 2009 at 16:41  
Blogger liwo said...

香港女星寫真,a片分享,美女色情裸體,台灣kiss情色貼圖,美腿圖,正妹,日本情色網,情色卡通下載,免費下載的做愛照片,線上a片免費看,tube影片,情色成人,ro 私服論壇,色情網,aaa片免費看短片分享區,日本人妻熟女自拍貼圖,蕃薯論壇,台灣網友自拍貼照,嘟嘟成人網,狂插漂亮美眉,8591論壇,女同志聊天室,人妻俱樂部網站,背包客棧論壇,成人性感內衣,看美女脫光光,黑澀會美眉無名,色咪咪貼影片,無碼a片,aa片免費看,免費線上觀看a片,做愛的圖片,色情漫畫,性感卡通美女圖片,香港a片,自拍,情色圖書館,plus 28 論壇,1007視訊,熟女自拍照,苗栗人聊天室,黑澀會美眉即時通,jp成人,色情,aaaaa片俱樂部,情侶歡愉用品,

okav成人影院,網友裸體自拍,交友ukiss,娘家影片,a片免費,黑澀會美眉即時通,人妻性交俱樂部,聊天室尋夢園,18禁,情色性感美女圖片,美女短片免費試看,3級女星寫真,情色短片論壇,摯愛中年聊天室,美腿貼圖,影音聊天,聊天室找一夜,g世代論壇,免費線上影片,淫蕩少女,火辣美眉自拍寫真貼圖,內衣寫真秀,美少女自拍,aa片免費看影片,麗的情色,gogo2sex,aooyy 成人玩具,台灣成人網,素人自拍,

22 April 2009 at 16:59  

Post a Comment

Subscribe to Post Comments [Atom]

Links to this post:

Create a Link

<< Home

1. 2. 3. Rupert's Read: On the impossibility of Time Travel! 4. 12. 15. 16. 17. 18. 19. 20. 23. 24.

25. 26. On the impossibility of Time Travel! 27. 28.

29.
I promised the occasional philosophical reflection on this blog. Here's one:
If I 'travel' 'back' into the past, then I am there in the past.
BUT, in my past, an older version of me wasn't present, anywhere. Therefore,
one cannot travel back into the past: for, if one travels back into the
past, IT IS NO LONGER ONE'S PAST that one is travelling back into...
30. 31. 32.