Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Sylvia Else Newsgroups: rec.arts.sf.written,sci.physics,sci.physics.relativity,alt.astronomy Subject: Re: Time Travel Is Not Possible Date: Mon, 2 Jan 2017 12:14:28 +1100 Lines: 46 Message-ID: References: <5866B352.6F63@ix.netcom.com> <5869A521.5FCE@ix.netcom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net 5DJw+k/sAjuaFCBJUwJAjwY4QaS13lEsjV45/SuhobfczfueNb Cancel-Lock: sha1:sl+XI7V0cqKVZD5OyGRDJYiZv9U= User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 In-Reply-To: <5869A521.5FCE@ix.netcom.com> Xref: csiph.com rec.arts.sf.written:461418 sci.physics:611255 sci.physics.relativity:403750 alt.astronomy:288544 On 2/01/2017 11:56 AM, The Starmaker wrote: > Michael J. Strickland wrote: >> >> On Fri, 30 Dec 2016 11:19:46 -0800, The Starmaker >> wrote: >> >>> lets say >>> you travel back in time >>> in a time machine and your >>> time machine lands on your >>> grandfather and kills him... >>> >>> >>> Time Travel Is Not Possible. >> >> And...? >> >> I don't claim (or know) if "time travel" back in time is possible, I'm >> just pointing out that your evidence/argument does not preclude it. >> >> Your old "grandfather/father/? paradox" is easily disposed of but >> there are some other difficulties which have to be overcome if you >> travel to the past and then return to the present. >> >> In your example, if your grandfather is alive in the present before >> you leave for the past, the grandfather you fall on in the past dies >> but that doesn't affect the grandfather you have when you return to >> the present. He is a separate entity. He is just as you left him >> (alive). Obviously he could have coincidentally died while you were >> "neglecting/relieving" him by traveling in time (lol) but it would >> have nothing to do with anything you did in the past to his earlier >> entity. > > THAT IS THE MOST RIDICULOUS THING I EVER HEARD! It's the outcome if a time traveller causes a branch in the past, but returns to his original time line when he goes back to the future. Such behaviour could also explain the lack of time travellers visiting us from the future - it would just mean that we are on the original time line for all of them. Sylvia.