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An expert in a particular field (a doctor, an actuary, etc.) can advise on the risk of mortality from a specific activity of anywhere between 0% and 100%. At what threshold of risk would the halacha determine whether a particular activity constitutes safek pikuach nefesh?

When experts disagree, would the halacha look at the opinion of a single expert, a simple majority of experts, or another criterion to determine the correct opinion to rely on?

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  • Note it doesn't just have to be a one specific number in all cases. It could be the number is different if it's a danger commonly taken seriously or a danger that's imminent or a danger that applies to a specific group or something else.
    – Double AA
    Jun 18 '20 at 16:26
  • Double AA - you are probably alluding to the fact that some risks fall under the concept of shomer pesaim Hashem - that question is here: judaism.stackexchange.com/questions/114750/…
    – Tesvov
    Jun 18 '20 at 17:22
  • Partially, and realize it's "pesayim" the yud is pronounced and the alef is silent
    – Double AA
    Jun 18 '20 at 17:24
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    Is safek pikuach nefesh the same as safek sakana?
    – user6591
    Jun 18 '20 at 18:00
  • cf judaism.stackexchange.com/q/66775/170
    – msh210
    Jun 19 '20 at 0:08

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