| | John Buridan’s Theory of Consequence and His Octagons of Opposition, p. 106, by Read, Stephen | 2012 | Buridan Sigma-4 | 6 | Rectangle |
| | John Buridan’s Theory of Consequence and His Octagons of Opposition, p. 108, by Read, Stephen | 2012 | Buridan Sigma-4 | 6 | Rectangle |
| | Why the Fregean "Square of Opposition" Matters for Epistemology, p. 112, by Giovagnoli, Raffaela | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | Two Concepts of Opposition, Multiple Squares, p. 124, by Kearns, John T. | 2012 | Classical Sigma-2 | 3 | Square |
| | Two Concepts of Opposition, Multiple Squares, p. 125, by Kearns, John T. | 2012 | Classical Sigma-2 | 3 | Square |
| | Two Concepts of Opposition, Multiple Squares, p. 126, by Kearns, John T. | 2012 | Non-Sigma | | Triangle |
| | Two Concepts of Opposition, Multiple Squares, p. 127, by Kearns, John T. | 2012 | Non-Sigma | | Triangle |
| | Does a Leaking O-Corner Save the Square?, p. 131, by Seuren, Pieter A. M. | 2012 | Classical Sigma-2 | 3 | Octagon |
| | Does a Leaking O-Corner Save the Square?, p. 132, by Seuren, Pieter A. M. | 2012 | Classical Sigma-2 | 3 | Octagon |
| | Does a Leaking O-Corner Save the Square?, p. 133, by Seuren, Pieter A. M. | 2012 | Buridan Sigma-4 | 4 | Octagon |
| | Oppositions and Opposites, p. 148, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |
| | Oppositions and Opposites, p. 148, by Schang, Fabien | 2012 | Contrariety 3-clique | 3 | Triangle |
| | Oppositions and Opposites, p. 148, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |
| | Oppositions and Opposites, p. 148, by Schang, Fabien | 2012 | Contrariety 3-clique | 3 | Triangle |
| | Oppositions and Opposites, p. 149, by Schang, Fabien | 2012 | Contrariety 3-clique | 3 | Triangle |
| | Oppositions and Opposites, p. 150, by Schang, Fabien | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Oppositions and Opposites, p. 153, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |
| | Oppositions and Opposites, p. 158, by Schang, Fabien | 2012 | Sherwood-Czeżowski Sigma-3 | 4 | Hexagon |
| | Oppositions and Opposites, p. 149, by Schang, Fabien | 2012 | Subcontrariety 3-clique | 3 | Triangle |
| | Oppositions and Opposites, p. 149, by Schang, Fabien | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Oppositions and Opposites, p. 160, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |
| | Oppositions and Opposites, p. 160, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |
| | Oppositions and Opposites, p. 160, by Schang, Fabien | 2012 | Sigma-0 Graph | 1 | Square |
| | Oppositions and Opposites, p. 160, by Schang, Fabien | 2012 | A Single PCD | 2 | Square |
| | Oppositions and Opposites, p. 160, by Schang, Fabien | 2012 | Classical Sigma-2 | 3 | Square |