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noamsol at Sep 18, 2018 06:44 PM
noamsol
jeffdown1

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74r
1880 Nov. 6

Being unable at present to write a second
paper on The Algebra of Logic I make notes for one.

Notes on Previous Paper

On Chapter I §4. I have represented that the properties
of the negative were

1st = A-overline = (A fork X)

2nd = A fork A-double-overline

3rd = A-double-overline fork A

In my circular I have shown stated correctly that 2nd= follows from
first and incorrectly that 3d=follows from 1st=, which
it don't. Very subtle fallacy [drawn?] from long
reduction of mood.

Observe 1st= is not balanced

Give table of moods etc.

4

Manuscripts, Logic Notebook, Robin Catalogue, SPIN Omeka Page