You have chosen 'Queries to the 'Opticks'' by Isaac Newton, 'Commentary on 'De Anima'' by Franciscus Toletus and 'On Second-Order Logic' by George Boolos
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| A. | Modes of Thought | |
| B. | Mechanics of Thought | |
| C. | Content | |
| D. | Concepts | |
| E. | Abstraction |