From: "Dan'l Danehy-Oakes"
Subject: RE: (urth) contra Summa contra Marcus Date: Mon, 25 Mar 2002 14:16:29 -0800 > > system, then, some mechanism must be provided for the motion > > away from the Solar system to somehow bring the WHORL back > > to the Solar system. > It flew in a circle, as Pas/Typhon intended. Well, this is at least plausible. But is there any _textual evidence_ in its favor? > > II. The genetic objection. > > The life forms of Blue/Green are sufficiently different > > from those of Urth that some mechanism must be proposed, > > and evidence given, for the production of one from the > > other. > The life forms of Blue are edible to those of Urth, and > vica-versa. On a galactic scale this is 99.99 percent > smilarity. While this is clever, it entirely evades the questions actually asked about the genetic issues. > > IV. The objection from gravitation > It is not possible that the Blue/Green system could > be gravitationally stable. Ergo, it is recent. It is not possible _if_ the distances given are accurate. However, there is no evidence that it is recent, and the ability of the inhumi to make the crossing argues that the two worlds have been having reasonably near passages for -- well, for long enough for such an expensive adaptation to have been worthwhile. There are two ways out of this: (1) the Neighbors, after reaching Green, deliberately engineered the inhumi to make the crossing -- which seems kind of unlikely (2) the ability to make the crossing is a side-effect of some aspect of the inhumi physiology (about which we -- probably -- do not know), originally evolved to meet some other need. This is what biologists call "pre-adaptationism," and is generally looked upon with some scorn, but I'll grant that GW is a bit of an evolutionary heretic so that's probably not an argument against this. However, again, this is putting the cart before the horse: all this is throwing hypotheticals at objections to an original hypothetical which has yet to be significantly supported from the text. > > Similarly, the failure of Horn to describe any real > > difference in weight, trajectory of thrown objects, walking > > gait, etc., between the surfaces of Blue, Green, and the > 1) The large animals of Green A brief glance at the geological history of Terra suggests that some extremely large animals are capable of existing under 1G conditions ... unless you care to suggest that the gravity of Earth has significantly increased since the age of dinosaurs? > 2) The vast trees of Green I live a few hours' drive from the giant redwoods of California. The trees of Green do not strike me as a significant argument for low gravity. --Blattid --