Digital Companion to C. S. Peirce
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Some Wit, Wisdom & Bewilderment
...it is supposed that the great problem in inventing an algebra or other system of logical representation is to create something equivalent to a calculating engine. The untrained mind does not see that every machine whatever is a logical machine working out incessantly new conclusions from premisses as long as the steam is kept up.
On Existential Graphs as an Instrument of Logical Research, c. 1906