> Not my subject area, but is fluid loss due to respiration and perspiration
> relatively small? Also, it seems like there's a fifo buffer of sorts where
> the 1L input over 2 hours is not necessarily output over the same two hour
> period or at the same rate...

Not my subject area either, but the way the question was worded, the
correct answer was in=out.  And under normal circumstances, I believe
that respiration and perspiration disappear in the noise.

The problem always made me think of Howard Hughes and his weird
behaviour with respect to milk bottles...

Mike H.
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