On Mon, 23 Aug 2010 15:43:54 -0400, Warp wrote:

>   I don't really agree with that. The metric system makes it trivial to
> switch between units as needed without the need of any calculations
> whatsoever.
> 
>   For example, a person can be 180 cm tall, or 1.8 meters tall, or 1
>   meter
> 80 cm tall. All three of these are completely and trivially exchangeable
> with each other without the need to do any kind of mental calculations
> whatsoever.

You're making a mental calculation there - you're dividing by 10.  It's 
easy, but that doesn't mean there's no calculation at all.

Jim

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