| 7. | Aristotle's Reform of Paideia | | | Article by Evelyn Barker, arguing that the principal aim of Aristotle's Organon was to reform the contemporary paedagogical role of dialectic. www.bu.edu |
| 8. | Square of Opposition | | | Article in the Stanford Encyclopaedia of Philosophy, by Terence Parsons. plato.stanford.edu |
| 9. | Logic | | | Entry in the Catholic Encyclopaedia (1917), dominated by a historical survey from Indian and Pre-Aristotelian philosophy to the Logic of John Stuart Mill. www.newadvent.org |
| 11. | Peter of Spain (Petrus Hispanus) | | | Life and work of 13th century logician and author of the Tractatus; from the Stanford Encyclopedia by Joke Spruyt. plato.stanford.edu |
| 12. | On Dialectic | | | By St. Augustine. Latin original together with translation by J. Marchand. www.georgetown.edu |
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