This guy's thesis is that in tough times, mental illness is associated with leadership effectiveness. His examples are Lincoln and WT sherman. (the stats argument here ends up being pretty weak).
Bottom line -- it's really hard to grade heuristics unless you have enough knowledge to restrict the situations which may occur in the future (and if you do, it's no longer a heuristic).
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Famous counterexample to this is the stuff about crisis leadership from a few years ago:
http://www.salon.com/2011/08/02/first_rate_madness_interview...
This guy's thesis is that in tough times, mental illness is associated with leadership effectiveness. His examples are Lincoln and WT sherman. (the stats argument here ends up being pretty weak).
Bottom line -- it's really hard to grade heuristics unless you have enough knowledge to restrict the situations which may occur in the future (and if you do, it's no longer a heuristic).