Comment by goodcanadian

Depends what you mean by debunked. It is a bit of a fantastical idea to begin with requiring technology and engineering on a scale much larger than anything in human experience. It is, therefore, a bit difficult to come up with a plausible plan let alone debunk that plan. I, for one, do not see any fundamental reasons why it couldn't be done, but I can come up with plenty of practical reasons why it probably won't be done anytime soon.