Hmm. I'm thinking that the brute force approach would be millions of different approaches to a given "word" and equally millions of different encoded responses? As in, "If object designated as "human" approaches object designeted as "manhole" alter the human vector so it doesn't intersect? [Goto program sections on how to alter human vectors]" I suppose that could work, though robots in that case probably couldn't make inferencesor deal at all with novel situations. And in that case, the Three Laws wouldn't be programs so much as design goals in the part of the programmers. Assuming I've read your meaning properly.