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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.