You have chosen 'Logicism and Ontological Commits. of Arithmetic' by Harold Hodes, 'Symbolic Reasoning' by Hugh MacColl and 'Letters to Oldenburg' by Baruch de Spinoza
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| A. | Modes of Thought | |
| B. | Mechanics of Thought | |
| C. | Content | |
| D. | Concepts | |
| E. | Abstraction |