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Comment Re:Does it matter? (Score 1) 294

Urban people have a smaller ecological footprint

Citation needed.
There's an ecological optimum somewhere between a hamlet and a megalopolis. If you live in a remote place, you need to take the car for many basic needs. If you live in a huge city, you need to import all your food, and export all your waste.

Comment Re:Infinity (Score 1) 1067

You're both correct for X divided by zero. It's simply not defined.

But GP was right for "Y plus red" and "Z times pineapple".
Both are defined in a mathematical sense :
* If Y is an integer, "Y+red" is defined in the free abelian group on the generator {1,red}.
* My math is rusty, but "Z times pineapple" should be defined in a multi-variable polynomial ring.
You don't need physics to define any of them. You can draw parallel to physical units, but you don't need to.

Finally, you're free to think that math is a human invention. My personal feeling is that we discover math more than we invent it, but I guess we'll never know for sure.

Comment Re:Ob (Score 1) 528

"First year or two"?
You're doing it wrong. The trick is to put your brain in a position where the only possible escape is to learn the new language, and learn it fast.
I made it clear to my room-mates/colleagues/acquaintances that I didn't want to fall back to any other language. They were really nice and patient, and were already laughing while I tried to make silly jokes with my 50 words vocabulary. I had some big headaches during the first month, and was exhausted every day after trying to make sense of the new language.
After about 2 months, I could speak well enough to make myself understood by anyone. I had a great time, and my social life was also helped because locals found it cute that I went through all this trouble.

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