You can eliminate the evidence that you consider double counted, for example grandiose self worth and grandiose plans, though those need to be both present because grandiose self worth without grandiose plans would just indicate some sort of miscommunication (and the self worth metric is more subjective), and are alone much poorer indicators than combined.
In any case accurate estimation of anything of this kind is very difficult. In general one just adopts a strategy such that sociopaths would not have sufficient selfish payoff for cheating it; altruism is far cheaper signal for non-selfish agents; in very simple terms if you give someone $3 for donating $4 to very well verified charity, those who value $4 in charity above $1 in pocket, will accept the deal. You just ensure that there is no selfish gain in transactions, and you're fine; if you don't adopt anti cheat strategy, you will be found and exploited with very high confidence as unlike the iterated prisoner dilemma, cheaters get to choose whom to play with, and get to make signals that make easily cheatable agents play with them; a bad strategy is far more likely to be exploited than any conservative estimate would suggest.
I blew through all of MoR in about 48 hours, and in an attempt to learn more about the science and philosophy that Harry espouses, I've been reading the sequences and Eliezer's posts on Less Wrong. Eliezer has written extensively about AI, rationality, quantum physics, singularity research, etc. I have a question: how correct has he been? Has his interpretation of quantum physics predicted any subsequently-observed phenomena? Has his understanding of cognitive science and technology allowed him to successfully anticipate the progress of AI research, or has he made any significant advances himself? Is he on the record predicting anything, either right or wrong?
Why is this important: when I read something written by Paul Krugman, I know that he has a Nobel Prize in economics, and I know that he has the best track record of any top pundit in the US in terms of making accurate predictions. Meanwhile, I know that Thomas Friedman is an idiot. Based on this track record, I believe things written by Krugman much more than I believe things written by Friedman. But if I hadn't read Friedman's writing from 2002-2006, then I wouldn't know how terribly wrong he has been, and I would be too credulous about his claims.
Similarly, reading Mike Darwin's predictions about the future of medicine was very enlightening. He was wrong about nearly everything. So now I know to distrust claims that he makes about the pace or extent of subsequent medical research.
Has Eliezer offered anything falsifiable, or put his reputation on the line in any way? "If X and Y don't happen by Z, then I have vastly overestimated the pace of AI research, or I don't understand quantum physics as well as I think I do," etc etc.