Tag Archives: four-square

Square Logic

Or do I mean Logic Square? Because it works either way. The Logic Square (or Square Logic) in question is a logic game created by Charles Lutwidge Dodgson (1832-1898) and introduced in his 1896 book Symbolic Logic Part I (a second part was published posthumously).

Dodgson was a capable mathematician, but most probably know him by his penname, Lewis Carroll, under which he wrote poetic fantasy fiction about a girl who goes on wild adventures.

But this is about his logic game. It’s like a square Venn diagram with game pieces.

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Johari Window

Johari-1One of the first blog articles I wrote concerned the idea of Yin and Yang. It’s a topic I’ve touched on several times since (and revisited in particular talking about men and women). I reference the concept so often, because I think the duality of opposing concepts is a fundamental truth about the universe.

It’s not the only truth, of course, but it’s a very useful way of seeing things and understanding them. We see duality everywhere! Sometimes it’s something versus the lack of something (heat/cold, light/dark, full/empty). Sometimes it’s truly opposing pairs (north/south, positive/negative, male/female).

Today I’d like to expand on the concept and tell you about the Johari Window.

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