What was Gottfried Wilhelm Leibniz’s idea for a universal language of reasoning?

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Gottfried Wilhelm Leibniz envisioned a "universally characteristic language" (lingua characteristica universalis) designed to serve as a precise, logical foundation for human thought. His concept for this language had two primary objectives:

  • Conceptual Decomposition: It would notationally represent complex ideas by displaying the more basic concepts from which they were composed.
  • Iconic Representation: It would represent concepts in a way that could be easily grasped by readers regardless of their native language, similar to how picture-like expressions function in Egyptian or Chinese scripts.

Leibniz intended for this language to work in tandem with a "calculus of reason" (calculus ratiocinator). By using a formal symbolism and established rules, he believed that reasoning could be performed mechanically or algorithmically, much like arithmetic. This would allow for the discovery of new truths and the verification of deductions, potentially even by machines, thereby eliminating errors caused by human failure or lack of ingenuity.1