| | The Genesis of the Truth-Table Device, p. 60, by Anellis, Irving H. | 2004 | Contrariety 4-clique | 4 | Tetrahedron |
| | Frege's Lectures on Logic. Carnap's Student Notes 1910-1914, p. 69, by Frege, Gottlob; Carnap, Rudolf; Reck, Erich H. (ed.); Awodey, Steve (ed.) | 2004 | Classical Logical Graph | 3 | Digon |
| | Nearly Every Normal Modal Logic is Paranormal, p. 280, by Marcos, João | 2005 | Classical Sigma-2 | 3 | Square |
| | Nearly Every Normal Modal Logic is Paranormal, p. 291, by Marcos, João | 2005 | Classical Sigma-2 | 3 | Square |
| | Towards a Mental Probability Logic, p. 94, by Pfeifer, Niki; Kleiter, Gernot D. | 2005 | Non-Sigma | 9 | Rectangle |
| | A Pragmatic Logic of Scientific Discovery, p. 232, by Sallantin, Jean; Dartnell, Christopher; Afshar, Mohammad | 2006 | Classical Sigma-2 | 3 | Rectangle |
| | A Pragmatic Logic of Scientific Discovery, p. 234, by Sallantin, Jean; Dartnell, Christopher; Afshar, Mohammad | 2006 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Rectangular Cuboid |
| | A Pragmatic Logic of Scientific Discovery, p. 234, by Sallantin, Jean; Dartnell, Christopher; Afshar, Mohammad | 2006 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Rectangular Cuboid |
| | A Generalization of Hume's Thesis, p. 111, by Woleński, Jan | 2006 | Classical Sigma-2 | 3 | Square |
| | A Generalization of Hume's Thesis, p. 112, by Woleński, Jan | 2006 | Sigma-4 Graph | 4–16 | Square |
| | Relevant Restricted Quantification, p. 590, by Beall, JC; Brady, Ross T.; Hazen, Allen P.; Priest, Graham; Restall, Greg | 2006 | Classical Sigma-2 | 3 | Rectangle |
| | Relevant Restricted Quantification, p. 590, by Beall, JC; Brady, Ross T.; Hazen, Allen P.; Priest, Graham; Restall, Greg | 2006 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Rectangle |
| | Deontic Logic, p. 201, by McNamara, Paul | 2006 | Classical Sigma-2 | 3 | Square |
| | Deontic Logic, p. 203, by McNamara, Paul | 2006 | Classical Sigma-2 | 3 | Square |
| | Deontic Logic, p. 203, by McNamara, Paul | 2006 | Non-Sigma | 3 | Hexagon |
| | Deontic Logic, p. 210, by McNamara, Paul | 2006 | Classical Sigma-2 | 3 | Square |
| | Deontic Logic, p. 248, by McNamara, Paul | 2006 | Classical Sigma-2 | 3 | Square |
| | A.N. Prior's Logic, p. 408, by Øhrstrøm, Peter; Hasle, Per | 2006 | Classical Sigma-2 | 3 | Rectangle |
| | A.N. Prior's Logic, p. 429, by Øhrstrøm, Peter; Hasle, Per | 2006 | Non-Sigma | | Hexagon |
| | Deontic Logic, p. 274, by McNamara, Paul | 2006 | Non-Sigma | | Octadecagon |
| | Deontic Logic, p. 275, by McNamara, Paul | 2006 | Non-Sigma | | Octadecagon |
| | Quantifiers in Language and Logic, p. 23, by Peters, Stanley; Westerståhl, Dag | 2006 | Classical Sigma-2 | 3 | Square |
| | Quantifiers in Language and Logic, p. 25, by Peters, Stanley; Westerståhl, Dag | 2006 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Square |
| | Fuzzy Quantifiers. A Computational Theory, p. 95, by Glöckner, Ingo | 2006 | Classical Sigma-2 | 3 | Square |
| | Fuzzy Quantifiers. A Computational Theory, p. 120, by Glöckner, Ingo | 2006 | Sigma-2 Graph | 3–4 | Square |