Popper, McLuhan, Fuller, Kant, Heidegger
What would those five names be doing in one post? Nothing much. Each of the five cases involves a fourfold for which I see no strong correlation to my fourfolds.

Karl Popper's tetrad — (a sequential tetrachotomy? or a genuine tetrad? of) problem, tentative theory, (attempted) error-elimination (especially by way of critical discussion), new problem(s): “P 1 » TT » EE » P2 . ” I’ve tried but haven’t yet found a correlation. I can see that it could be argued that it’s a triad beginning to cycle.

Marshall McLuhan's tetrad — a tetrachotomy of enhancement, erosion, retrieval, reversal — I’ve tried but haven’t yet found a correlation.

Buckminster Fuller's tetrahedra — are not about specific foursomes of philosophically relevant conceptions, as far as I’ve been able to tell.

KANT'S TABLE OF CATEGORIES 1 of Quantity: Unity plurality totality 2 Quality Reality Negation Limitation 3 Relation Substance and accident  Cause and effect  Action and reaction    4 Modality Possibility -- Impossibility Existence -- Non-existence Necessity -- Contingency		TETRASTIC CATEGORIES (mine)
		Correspondence / variance (another than, double of, sum of, antiderivative of, etc.). Mode of attributability (indeed, not, if, possibly, novelly, probably, optimally, feasibly, etc.).	И	Modification, attribute, accident (firm, unsound, well, ill, steady, irregular, strong, weak, etc.). Substance, hypostasis (this man, this horse, etc.).

Kant's basic four categories -- quantity, quality, relation, modality. I don't see any special resemblance to my fours.

Martin Heidegger's fourfold — earth, sky, mortals, and divinities — I’ve tried but haven’t yet found a correlation or even a way to understand it. In "The Restriction of Being" in Introduction to Metaphysics, Heidegger discusses a four-way restriction or delimitation of Being by things which aren't non-being but which are nevertheless seen in oppositions to Being. I don't see a correlation there either. (In Heideggers's diagram the reader sees "the ought" above an upward arrow rising from "Being"; from "Being" an arrow points leftward to "becoming"; from "Being" an arrow points rightward to "seeming"; and beneath "Being" the reader sees "thinking" and a two-way vertical arrow both up and down between them.)


Update: Here's my vent anent Popper's use of the words "verification" and "falsification." - posted by The Tetrast @ 10:08 PM [top of post] [top of page] Copyright © BenjaminðA.ðUde11.