In the system of Aristotelian logic, the square of opposition is a diagram representing the different ways in which each of the four propositions of the system is logically related ('opposed') to each of the others. The system is also useful in the analysis of syllogistic logic, serving to identify the allowed logical conversions from one type to another.
Read more about Square Of Opposition: Summary, The Problem of Existential Import, Modern Squares of Opposition, Logical Hexagons and Other Bi-simplexes
Famous quotes containing the words square and/or opposition:
“I walked by the Union Square Bar, I was gonna go in. And I saw myself, my reflection in the window. And I thought, “I wonder who that bum is.” And then I saw it was me. Now look at me, I’m a bum. Look at me. Look at you. You’re a bum.”
—J.P. (James Pinckney)
“I fear the popular notion of success stands in direct opposition in all points to the real and wholesome success. One adores public opinion, the other, private opinion; one, fame, the other, desert; one, feats, the other, humility; one, lucre, the other, love; one, monopoly, and the other, hospitality of mind.”
—Ralph Waldo Emerson (1803–1882)