[godelski]

> Cephalopods have got onto land at least twice. Nothing says they can't do it again.

Sure? But isn't that my point? They sure looked different and had different physical attributes when they lived on land.

> They can't stand up to ionizing radiation. This isn't biology, this is physics!

I wouldn't compare this to the ability to use a screwdriver. Or in a more abstract way, be able to grasp, twist, and push.