This is a good article making a valuable point. But this —
Temperature is sometimes taught as, "a measure of the average kinetic energy of the particles," because for an ideal gas U/N = (3/2) kBT. This is wrong, for the same reason that the ideal gas entropy isn't the definition of entropy.
— is a confusing way to speak. There is such a thing as "the average kinetic energy of the particles", and one measure of this thing is called "temperature" in some contexts. There is nothing wrong with this as long as you are clear about what context you are in.
If you fall into the sun, your atoms will be strewn far and wide, and it won't be because of something "in the mind". There is a long and perfectly valid convention of calling the relevant feature of the sun its "temperature".
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When you go to GiveWell's Donate page, one of the questions is,
And you can choose the options:
Grants to recommended charities
Unrestricted donation
I notice I'm reluctant to pick "Unrestricted," fearing my donation might be "wasted" on GiveWell's operations, instead of going right to the charity. But that seems kind of strange. Choosing "Unrestricted" gives GiveWell strictly more options than choosing "Grants to recommended charities" because "Unrestricted" allows them to use the money either for their own operations, or just send it to the charities anyway. So as long as I trust GiveWell's decision-making process, "Unrestricted" is the best choice. And I presumably do trust GiveWell's decision-making, since I'm giving away some money based on their say-so. But I'm nevertheless inclined to hit "Grants to recommended charities," despite, like, mathematical proof that that's not the best option.
Can we talk about this a little? How can I get less confused?