Omnium Rerum **Principia** Parva Sunt."

— The beginnings of all things are small.

— Variant translation: Everything has a small beginning.

— "De Finibus Bonorum et Malorum" Book V, Chapter 58

...a theorem of propositional logic if and only if f(p1, p2 ,..., pn) is a tautology . ... He (Emil L.Post) uses the word to discuss the adequacy of a system of functions to express all the possible truth tables (this is nowadays called truth-functional completeness). In this way he shows not only that through the connectives of **Principia** (? and ?) one can generate all possible truth tables but also that there are only two connectives which can, singly generate all the truth tables.

— Emil L.Post, in The Adventure of Reason: Interplay Between Philosophy of Mathematics and ..., p.104

Omnium Rerum **Principia** Parva Sunt."

— The beginnings of all things are small.

— Variant translation: Everything has a small beginning.

— "De Finibus Bonorum et Malorum" Book V, Chapter 58

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