Combining Texts

All the ideas for 'Abstract of 'The Fourfold Root'', 'Intro to 2nd ed of Principia Mathematica' and 'Basic Problems of Phenomenology'

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9 ideas

2. Reason / B. Laws of Thought / 2. Sufficient Reason
4187 'There is nothing without a reason why it should be rather than not be' (a generalisation of 'Why?') [Schopenhauer]
5. Theory of Logic / C. Ontology of Logic / 2. Platonism in Logic
15571 The idea of an atemporal realm of validity is as implausible as medieval theology [Heidegger]
7. Existence / C. Structure of Existence / 6. Fundamentals / d. Logical atoms
21681 Given all true atomic propositions, in theory every other truth can thereby be deduced [Russell]
10. Modality / C. Sources of Modality / 1. Sources of Necessity
4192 All necessity arises from causation, which is conditioned; there is no absolute or unconditioned necessity [Schopenhauer]
11. Knowledge Aims / A. Knowledge / 2. Understanding
4190 All understanding is an immediate apprehension of the causal relation [Schopenhauer]
16. Persons / C. Self-Awareness / 2. Knowing the Self
4191 What we know in ourselves is not a knower but a will [Schopenhauer]
16. Persons / D. Continuity of the Self / 3. Reference of 'I'
21368 The knot of the world is the use of 'I' to refer to both willing and knowing [Schopenhauer]
23. Ethics / F. Existentialism / 6. Authentic Self
15581 Dasein is always only that which it has chosen to be [Heidegger]
27. Natural Reality / D. Time / 1. Nature of Time / b. Relative time
4189 Time may be defined as the possibility of mutually exclusive conditions of the same thing [Schopenhauer]