Jon,
Lovely, just lovely! - Thank you very much!
Kirsti
On 9.4.2012, at 17.00, Jon Awbrey wrote:
> Peircers,
>
> Not too coincidentally with the mention of Peirce's existential graphs,
> a tangent of discussion on another blog brought to mind an old favorite
> passage from Peirce, where he is using his entitative graphs to exposit
> the logic of relatives. Here is the observation that I was led to make:
>
> | Paradisaical Logic
> |
> | Negative operations (NOs), if not more important than
> | positive operations (POs), are at least more powerful
> | or generative, because the right NOs can generate all
> | POs, but the reverse is not so.
> |
> | Which brings us to Peirce’s amphecks, NAND and NNOR,
> | either of which is a sole sufficient operator for all
> | boolean operations.
> |
> | In one of his developments of a graphical syntax for logic,
> | that described in passing an application of the Neither-Nor
> | operator, Peirce referred to the stage of reasoning before
> | the encounter with falsehood as “paradisaical logic, because
> | it represents the state of Man’s cognition before the Fall.”
> |
> | Here’s a bit of what he wrote there —
> |
> | C.S. Peirce • Relatives of Second Intention
> |
> http://inquiryintoinquiry.com/2012/04/07/c-s-peirce-%E2%80%A2-relatives-of-second-intention/
>
> Regards,
>
> Jon
>
> --
>
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>
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