Things that are true ...

... Zeno's Paradox is only true when you're falling into a black hole.
Similarly, Lamarckian evolution is only true for software, memes and, eventually, the entities produced thereof.

Vernor Vinge deliberately left out self-replicating machines from Marooned In Realtime because one of the novel's prime conceits i.e. the inability to repair autons, could not exist otherwise.