If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "
This is a good point; using 0 as a reference point for freezing, which does have real life applications (is it going to snow? will this morning's rain cause icy roads? etc.) is much less arbitrary than how it's used on the Fahrenheit scale. I suppose boiling has cooking applications as well?
The granularity point is interesting; in the US, setting a building's thermostat to 68 degrees Fahrenheit vs. 66 degrees Fahrenheit is typically considered a pretty non-arbitrary decision as far as saving money vs. gaining comfort goes. Now that I actually stop and think about it though, if you asked me to guess what temperature a building I'm currently in's thermostat was set at, I'm not sure I'd actually be able to tell you.
In fact, I'm not sure I could even consistently guess what temperature the air around me is without being at least 5 degrees Fahrenheit off. Now that you point it out to me, less granularity probably makes life a bit simpler.
Plenty of Celsius thermostats can be set to within a tenth of degree (not that I know anybody who ever sets the tenths' digit to anything other than 0 or 5).