Ideas from 'Prior Analytics' by Aristotle [328 BCE], by Theme Structure
[found in 'Prior Analytics' by Aristotle (ed/tr Smith,Robin) [Hackett 1989,0872200647]].
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4. Formal Logic / A. Syllogistic Logic / 1. Aristotelian Logic
22271

Aristotle was the first to use schematic letters in logic [Potter]

18909

Aristotelian sentences are made up by one of four 'formative' connectors [Engelbretsen]

8080

Aristotelian identified 256 possible syllogisms, saying that 19 are valid [Devlin]

13912

Aristotle replace Plato's nounverb form with unions of pairs of terms by one of four 'copulae' [Engelbretsen/Sayward]

8071

Aristotle listed nineteen valid syllogisms (though a few of them were wrong) [Devlin]

11060

Aristotelian syllogisms are threepart, subjectpredicate, existentially committed, with laws of thought [Hanna]

4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
13819

Aristotle's said some Fs are G or some Fs are not G, forgetting that there might be no Fs [Bostock]

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
9403

There are three different deductions for actual terms, necessary terms and possible terms

5. Theory of Logic / B. Logical Consequence / 3. Deductive Consequence 
11148

Deduction is when we suppose one thing, and another necessarily follows

5. Theory of Logic / E. Structures of Logic / 1. Logical Form
18896

Aristotle places terms at opposite ends, joined by a quantified copula [Sommers]

5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic
3300

Aristotle's logic is based on the subject/predicate distinction, which leads him to substances and properties [Benardete,JA]

5. Theory of Logic / G. Quantification / 1. Quantification
11149

Affirming/denying sentences are universal, particular, or indeterminate

5. Theory of Logic / G. Quantification / 3. Objectual Quantification
8079

Aristotelian logic has two quantifiers of the subject ('all' and 'some') [Devlin]

10. Modality / A. Necessity / 4. De re / De dicto modality
14641

A deduction is necessary if the major (but not the minor) premise is also necessary

15. Nature of Minds / C. Capacities of Minds / 5. Generalisation by mind
18911

Linguistic terms form a hierarchy, with higher terms predicable of increasing numbers of things [Engelbretsen]
