Just a note on the "arbitrariness" of fahrenheit mentioned in the show.  fahrenheit's  original "set points" were original what was thought to be human body temperatures in the time it was invented.  Thus, a healthy human was pegged at 100 degrees, later advances in accuracy adjusted that to 98 degrees.
The two are just as arbitrary, using 100 degrees for boiling water or what temperature you think a healthy person should be at.
Not that I'm all that fond of either system, I just wanted to point out the historical tidbit.
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dg