Suppose a hyperintelligent alien race did build a space shuttle equivalent as their first space-capable craft, and then went on to build interplanetary and interstellar craft.
Alien 1: The [interstellar craft, driven by multiple methods of propulsion and myriad components] disproves Gall's Law.
Alien 2: Not at all. [Craft] is a simple extension of well-developed principles like the space shuttle and the light sail.
You can simply define a "working simple system" as whatever you can make work, making that a pure tautology.
I would say that Gall's Law is about the design capacities of human beings (like Dunbar's Number), or is something like "there's a threshold to how much new complexity you can design and expect to work", with the amount of complexity being different for humans, superintelligent aliens, chimps, or Mother Nature.
(the limit is particularly low fo Mother Nature - she makes smaller steps, but got to make much more of them)
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.