Combining Texts

All the ideas for 'Wiener Logik', 'Elucidation of some points in E.Schrder' and 'The Nature of Existence vol.1'

expand these ideas     |    start again     |     specify just one area for these texts

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5 ideas

2. Reason / D. Definition / 2. Aims of Definition

18261

A simplification which is complete constitutes a definition [Kant]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

14238

A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]

5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

22275

Logic gives us the necessary rules which show us how we ought to think [Kant]

9. Objects / B. Unity of Objects / 2. Substance / d. Substance defined

22628

Substance has to exist, with no intrinsic qualities or relations [McTaggart]

13. Knowledge Criteria / A. Justification Problems / 3. Internal or External / b. Pro-externalism

18260

If we knew what we know, we would be astonished [Kant]