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I comment on what impression he translates to public, that risks are remote and space colonies will save us. He may secretly have other thoughts on the topic, but this does not matter. We could reconstruct his line of reasoning, but most people will not do it. Even if he thinks that risks are 1 per cent in next 50 years it results in 87 per cent in 10 000 years. I think that attempts to reconstructs some one line of reasoning with goal to get more comforting result is biased.
For example one may said: "I want to kill children". But we know apriori that he is clever and kind man. So may be he started from the idea that he wants to make the world better place and may be he just wanted to say that he would like to prevent overpopulation. But I prefer to take claims on their face value. No matter who say it and what he may think, but didn't said.
Self-sustain Mars colonies are able to create nukes on their own. If a war starts on Earth and if we have several colonies on Mars built by different countries, they could start war between each other too. In this case travel time for nukes will still be minutes - from one point on Mars to another. The history of WW2 shows that war between metropolis often resulted in the war in colonies (North Africa).
Hawking has been quoted about AI in 100 years in another article about the same lectures.
That's not my idea of "near certainty".
That is not my goal, and I have no idea why you suggest it is.
It doesn't appear to me that you are doing this in Hawking's case; rather, you are reading all sorts of implications into his words that they don't logically entail and don't seem to me to imply in weaker senses either.
Sure, they could. But I don't see any particular reason to ... (read more)