Re: Natural keys vs Aritficial Keys

On May 19, 1:11 pm, Gene Wirchenko <ge..._at_ocis.net> wrote:
> "Walter Mitty" <wami..._at_verizon.net> wrote:
> >"David BL" <davi..._at_iinet.net.au> wrote in message
>
> [snip]
>
> >> I recall reading about an experiment on mice that demonstrated that
> >> they could at some level understand the abstract concept of numbers by
> >> counting the objects presented on a card in order to avoid a nasty
> >> electric shock by conditionally jumping over a barrier.   To be judged
> >> successful the mouse had to be able to count objects it had never seen
> >> before. It was claimed that mice can count up to 3.
>
> >In a different experiment, they showed that crows can count up to 7.
>
>      2-bit unsigned and 3-bit unsigned.

Then there's the tern-ary number system...

>
> Sincerely,
>
> Gene Wirchenko
>
> Computerese Irregular Verb Conjugation:
>      I have preferences.
>      You have biases.
>      He/She has prejudices.
Received on Thu May 21 2009 - 06:00:20 CEST