I agree with your 3 answers, but they are 3 answers to a different, more general, question.
Originally Posted by skanking biker
The question I asked was very specific: Do you take total responsibility for your safety when cycling in traffic? That's covered by your #1.
Your #2, that motorists are responsible for driving in accordance with the laws and not endangering my safety, is wishful thinking, since you have no way to know whether they have taken on that responsibility or not. That motorists should be responsible "for driving in accordance with the laws and not endangering my safety or the safety of anyone else using the road" is a separate matter (of course I believe they should be responsible, but I also think it's irresponsible to expect that they are). The fact that many of them are not responsible only makes the burden in #1 that much more.
Your #3, which I agree with, is again an answer to some other question.
"The urban cyclist's best chance is to gather all the responsibilty that can be gathered. Hoard it from those around you. Have faith that you will do a better job with it than they will, and make it so. Don't trust your fate to the police, the planners, the pedestrians, or the paramedics. Don't leave your fate to the stars, or to luck. Definitely don't leave your fate to the drivers."--Robert Hurst