Quote:
+40 -- roasting hot
+30 -- hit the beach
+20 -- t-shirt weather
+10 -- cool, put on a light jacket
0C ---- freezing point. Turn on the furnace.
-10 -- Perfect outdoor hockey weather
-20 -- Cold, but if you're not a pussy you'll survive
-30 -- Don't go out unless you have to. Put on a parka and long-johns
-40 -- Seriously, don't go out unless you have to.
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Again, people... it just doesn't get any simpler than this.
It makes the most sense to have zero as the freezing point. And all this pseudo-logic about the other scales being more details is bullocks. We're talking about a universal system that entire populations can grasp, and in terms of describing the temperature outside to the masses there simply is no better system than the Celsius scale. And over 90% of the world agrees with that, obviously.