mrow84
Joined 13 years ago
Joined 13 years ago
> The complaint accused them of direct involvement in war crimes and acts potentially constituting genocide in Gaza — specifically, indiscriminate attacks on civilian areas, torture, and forced displacement.
Seems pretty clear?
edit: I accept that the non-layman’s answer may hold, I just find the intuition a bit off.
This is a great insight.
It could be used to avoid unnecessarily inconveniencing customers, as you suggest, or it could be used to improve the strength of utility companies’ positions in disputes. Perhaps both?
Are you sure about those temperatures/humidities? 100 F with 99 % humidity equates to a wet bulb of 37.75 C [2], well above the commonly accepted theoretically survivable limit of 35 C.
[0] https://www.weatherwx.com/hazardoutlook/sc/fort+jackson.html
[1] https://www.omnicalculator.com/physics/wet-bulb?advanced=1&c...
[2] https://www.omnicalculator.com/physics/wet-bulb?advanced=1&c...
[0] https://www.statista.com/statistics/195908/number-of-births-...
> Flatworms first appeared 800+ million years ago
Surviving for 800 million years seems to me like a pretty good indicator of meaningful generalisation.
A=60 is the amount in our chosen envelope - we are given this information in the variant in this thread. What we still don't know is if that is the larger amount (and thus the other envelope contains 30, and therefore x=30), or the smaller amount (and the other envelope contains 120, and therefore x=60).
The error is (in step 7) to calculate the arithmetic expectation of those absolute values, because they do not exist "together". The correct arithmetic mean can be obtained by considering the different conditions in which those values do exist, as described in [0]. However, the ratios do exist "together" - the other envelope contains either double or half of 60 - so we could instead calculate the geometric mean, of either the ratios or the corresponding absolute values, and obtain the correct result:
(2 * 0.5) ** 0.5 = 1
(120 * 30) ** 0.5 = 60
[0] https://en.wikipedia.org/wiki/Two_envelopes_problem#Other_si...edit: changed “first envelope” to “chosen envelope” for clarity.
1. Denote by A=60 the amount in the player's selected envelope.
2. The probability that A=60 is the smaller amount is 1/2, and that it is the larger amount is also 1/2.
3. The other envelope may contain either 2A=120 or A/2=30.
4. If A=60 is the smaller amount, then the other envelope contains 2A=120.
5. If A=60 is the larger amount, then the other envelope contains A/2=30.
6. Thus the other envelope contains 2A=120 with probability 1/2 and A/2=30 with probability 1/2.
7. So the expected value of the money in the other envelope is: 1/2(120) + 1/2(30) = 75
8. This is greater than A=60 so, on average, the person reasons that they stand to gain by swapping.
9. ...
edit: If anything, to me this obscures things further, because it makes it non-obvious that we are actually talking about ratios (i.e. 2A, 1/2A) rather than absolute numbers, and so the expectation calculated in step 7 is inappropriate - a geometric mean recovers the correct answer.