Backwards Time Travel: Breaking the Heisenberg Principle?

[ZapperZ]

This is always the risk whenever a topic like this starts. It appears that this thread is also heading in this direction.

May I remind everyone involved of the PF Guidelines that you have agreed to. In particular, our policy on speculative post is very clear:

Overly Speculative Posts:
One of the main goals of PF is to help students learn the current status of physics as practiced by the scientific community; accordingly, Physicsforums.com strives to maintain high standards of academic integrity. There are many open questions in physics, and we welcome discussion on those subjects provided the discussion remains intellectually sound. It is against our Posting Guidelines to discuss, in most of the PF forums, new or non-mainstream theories or ideas that have not been published in professional peer-reviewed journals or are not part of current professional mainstream scientific discussion. Posts deleted under this rule will be accompanied by a private message from a Staff member, and, if appropriate, an invitation to resubmit the post in accordance with our Independent Research Guidelines. Poorly formulated personal theories, unfounded challenges of mainstream science, and overt crackpottery will not be tolerated anywhere on the site. Linking to obviously "crank" or "crackpot" sites is prohibited.

If this thread dives further into such speculation, it will be locked, and subsequent thread on this "time travel" topic will be severely curtailed. So you decide the fate of this thread.

Zz.

 

[scupydog]

You need to be very careful in saying something like this. Many people have used that as a license to bastardize various aspects of physics, simply because "the laws of physics" permits such a thing. The laws of physics also permit a broken vase to reassemble itself back into its original form, but you don't see that happening, do you?

Science fiction also has a knack of having something that hasn't been shown to become science. We don't hear about those, do we? It's like a psychic highlighting only the things he/she predicted that actually happened. All the other misses, no one ever mentioned them.

So just because science, as we know it now, permitted them, and just because it is in science fiction novels, do not have any bearing on whether it is valid.

Zz.

Thx ZapperZ for your reply i quite understand your reasoning.