Combining Philosophers
Ideas for Friedrich Schlegel, Hilary Putnam and ZoltÃƒÂ¡n Gendler SzabÃƒÂ³
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2 ideas
5. Theory of Logic / A. Overview of Logic / 2. History of Logic
18954

Before the late 19th century logic was trivialised by not dealing with relations [Putnam]

5. Theory of Logic / A. Overview of Logic / 5. FirstOrder Logic
18956

Asserting firstorder validity implicitly involves secondorder reference to classes [Putnam]
