|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 15, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 4–5 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 2, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Classical Sigma-2 | 3 | Rectangle |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 2, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 2, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Jacoby-Sesmat-Blanché Sigma-3 | 4 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 4, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Classical Sigma-2 | 3 | Rectangle |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 4, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 5 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 4, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 5 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 7, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 4 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 7, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 4 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 11, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 11, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 12, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 4 | Hexagon |
|  | Boolean Subtypes of the U4 Hexagon of Opposition, p. 12, by Demey, Lorenz; Erbas, Doruk Atahan | 2024 | Degenerate Sigma-3 with Unconnectedness 4 | 4 | Hexagon |
|  | Critical Thinking. An Introduction to Reasoning Well, p. 97, by Watson, Jamie Carlin; Arp, Robert; King, Skyler | 2024 | Classical Sigma-2 | 3 | Rectangle |
|  | Display Conventions for Octagons of Opposition, p. 2, by Makinson, David | 2024 | Buridan Sigma-4 | 6 | Octagon |
|  | Display Conventions for Octagons of Opposition, p. 4, by Makinson, David | 2024 | Buridan Sigma-4 | 6 | Octagon |
|  | Display Conventions for Octagons of Opposition, p. 5, by Makinson, David | 2024 | Buridan Sigma-4 | 6 | Hexagon |
|  | Display Conventions for Octagons of Opposition, p. 6, by Makinson, David | 2024 | Buridan Sigma-4 | 6 | Hexagon |
|  | Display Conventions for Octagons of Opposition, p. 8, by Makinson, David | 2024 | Keynes-Johnson Sigma-4 | 7 | Hexagon |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 225, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 225, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 229, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 229, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 230, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |
|  | Stoic Sign-Inference and Their Lore of Fate, p. 230, by Schumann, Andrew | 2024 | Classical Sigma-2 | 3 | Square |