[Sloth]

Because non-replicating machines are created by an intelligent designer while replicating entities are the product of biological evolution.

Really??? With all the robotics used in manufacturing, you're saying it's impossible to build robots that in turn build more robot-building robots? (Or rather, that if you do, the robots somehow become products of biological evolution?)

[shuckmaster]

you're saying it's impossible to build robots that in turn build more robot-building robots?

Do your robots have DNA? Otherwise, they're intellegently designed and will not evolve. We're talking biology here.