# Author L. Kauffman

Guddemi P., Brier S. & Kauffman L. H. (2015) Foreword: Ranulph Glanville and How to Live the Cybernetics of Unknowing A Festschrift Celebration of the Influence of a Researcher. Cybernetics & Human Knowing 22(2–3): 7–10.

Guddemi P., Brier S. & Kauffman L. H.
(

2015)

Foreword: Ranulph Glanville and How to Live the Cybernetics of Unknowing A Festschrift Celebration of the Influence of a Researcher.
Cybernetics & Human Knowing 22(2–3): 7–10.
Kauffman L. (1998) Virtual logic – The calculus of indication. Cybernetics & Human Knowing 5(3): 63–70. https://cepa.info/2900

Kauffman L.
(

1998)

Virtual logic – The calculus of indication.
Cybernetics & Human Knowing 5(3): 63–70.
Fulltext at https://cepa.info/2900
This is the sixth column in this series on ‘Virtual Logic’. In this column we shall give a short exposition of how symbolic logic is illuminated by the calculus of indications. Columns four and five began an introduction to the calculus of indications. Nevertheless, we shall be self-contained here and recall this construction in section 1.

Kauffman L. H. (1978) Network synthesis and Varela’s calculus. International Journal of General Systems 4: 179–187. https://cepa.info/1822

Kauffman L. H.
(

1978)

Network synthesis and Varela’s calculus.
International Journal of General Systems 4: 179–187.
Fulltext at https://cepa.info/1822
Network models are given for self-referential expressions in the calculus of indications (of G. Spencer Brown). A precise model is presented for the behavior of such expressions in time. The extension of Brown’s calculus by F. Varela is then shown to describe behavior invariant properties of these networks. Network design is discussed from this viewpoint.

Kauffman L. H. (1987) Imaginary values in mathematical logic. In: Proceedings of the Seventeenth International Conference on Multiple Valued Logic. IEEE: 282–289. https://cepa.info/1842

Kauffman L. H.
(

1987)

Imaginary values in mathematical logic.
In: Proceedings of the Seventeenth International Conference on Multiple Valued Logic. IEEE: 282–289.
Fulltext at https://cepa.info/1842
We discuss the relationship of G. Spencer-Brown’s Laws of Form with multiple-valued logic. The calculus of indications is presented as a diagrammatic formal system. This leads to new domains and values by allowing infinite and self-referential expressions that extend the system. We reformulate the Varela/Kauffman calculi for self-reference, and give a new completeness proof for the corresponding three-valued algebra (CSR).

Kauffman L. H. (1987) Self-reference and recursive forms. Journal of Social and Biological Structures 10: 53–72. https://cepa.info/1816

Kauffman L. H.
(

1987)

Self-reference and recursive forms.
Journal of Social and Biological Structures 10: 53–72.
Fulltext at https://cepa.info/1816
The purpose of this essay is to sketch a picture of the connections between the concept self-reference and important aspects of mathematical and cybernetic thinking. In order to accomplish this task, we begin with a very simple discussion of the meaning of self-reference and then let this unfold into many ideas. Not surprisingly, we encounter wholes and parts, distinctions, pointers and indications. local-global, circulation, feedback. recursion, invariance. self-similarity, re-entry of forms, paradox, and strange loops. But we also find topology, knots and weaves. fractal and recursive forms, infinity, curvature and imaginary numbers! A panoply of fundamental mathematical and physical ideas relating directly to the central turn of self-reference.

Kauffman L. H. (1998) Virtual logic – self-reference and the calculus of indications. Cybernetics & Human Knowing 5(2): 75–82.

Kauffman L. H.
(

1998)

Virtual logic – self-reference and the calculus of indications.
Cybernetics & Human Knowing 5(2): 75–82.
This is the fifth column in this series on “Virtual Logic.” In this column we shall begin by recalling the “Descent into the Form” that was described in the previous column, and how this descent makes clear how the mark of distinction can be seen as self-referential. We then relate this direct appearance of self-reference to other models and to Godel’s Incompleteness Theorem. The author apologizes beforehand for the ending of Part III of this essay with its modulation on the final lines of “Little Gidding” by T. S. Eliot.

Kauffman L. H. (1998) Virtual Logic – symbolic logic and the calculus of indications. Cybernetics & Human Knowing 5(3): 63–70. https://cepa.info/3114

Kauffman L. H.
(

1998)

Virtual Logic – symbolic logic and the calculus of indications.
Cybernetics & Human Knowing 5(3): 63–70.
Fulltext at https://cepa.info/3114
This is the sixth column in this series on “Virtual Logic.” In this column we shall give a short exposition of how symbolic logic is illuminated by the calculus of indications. Columns four and five began an introduction to the calculus of indications. Nevertheless, we shall be self-contained here and recall this construction in section 1.

Kauffman L. H. (1998) Virtual logic – The Smullyan Machine. Cybernetics & Human Knowing 5(4): 71–80. https://cepa.info/3119

Kauffman L. H.
(

1998)

Virtual logic – The Smullyan Machine.
Cybernetics & Human Knowing 5(4): 71–80.
Fulltext at https://cepa.info/3119
This is the seventh column in this series on “Virtual Logic.” In this column I will discuss an imaginary machine devised by the logician Raymond Smullyan. Smullyan managed to compress the essence of Gödel’s theorem on the incompleteness of formal systems into the properties of a devilish machine. This column consists in two parts. In the first part we find a story/satire about such a machine, with the Smullyan structure at its core. In this story, the protagonist is bent on detecting a flaw in the machine and he operates with strict two-valued logic. In such logic a statement is either true or false. Thus we call the statement “If unicorns can fly then all numbers are less than pi.” true because it is not definitely false. In general “A implies B” is taken to be false only if A is true and B is false. This is the one significant case where “A implies B” must be false. All other cases, such as A false and B true are taken to be true. This is the classical logical convention. It works quite well in its own domain, but it has its limits. One of these limits occurs when there is a gradation of qualities. For example in statements about tall and short the truth is relative to your idea of this discrimination. Another limit is in the realm of self-referential statements. Certainly the Liar Paradox – “This statement is false.” is neither true nor false in any timeless sense.

Kauffman L. H. (1999) Virtual logic – The Flagg Resolution. Cybernetics & Human Knowing 6(1): 87–96. https://cepa.info/3125

Kauffman L. H.
(

1999)

Virtual logic – The Flagg Resolution.
Cybernetics & Human Knowing 6(1): 87–96.
Fulltext at https://cepa.info/3125
This is my eighth column on virtual logic. In this column we shall consider a mode of paradox resolution that I call the “Flagg Resolution” after its inventor James M. Flagg.

Kauffman L. H. (1999) Virtual logic – The Matrix. Cybernetics & Human Knowing 6(3): 65–69. https://cepa.info/3135

Kauffman L. H.
(

1999)

Virtual logic – The Matrix.
Cybernetics & Human Knowing 6(3): 65–69.
Fulltext at https://cepa.info/3135
This is column number nine in the series. We take as our theme the recent movie “The Matrix.” The Matrix is a cinematic exercise in virtual reality and virtual logic. It is not necessary to have seen the film to read this essay. The Matrix is all around you. It is in the air you breathe, in the ground you walk on, in the sights you see and in the feelings that you feel. You yourself are composed of it just as much as it is composed of you. You imagine yourself to be an observer independent of the Matrix, but the very possibility of your observation, your sense of Self and World is produced by the Matrix.

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