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Early Modern · 1662
Logic, or the Art of Thinking
La Logique de Port-Royal
Antoine Arnauld and Pierre Nicole
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What it is
A logic textbook that treats ideas, judgement, reasoning, and method, and introduces probability into the discussion of belief for the first time.
Why it lasted
The standard logic text of Europe for two centuries, and its final chapters are among the earliest treatments of decision under uncertainty.
Where to read it
Public domain and free to read in full, though not held here. The archives below have it.
These open a search on each archive rather than a direct link, which is the honest way to point at an edition nobody here has checked line by line.
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