Combining Texts

All the ideas for 'Frege philosophy of mathematics', 'Human, All Too Human' and 'Introduction to Zermelo's 1930 paper'

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


86 ideas

1. Philosophy / A. Wisdom / 1. Nature of Wisdom
The highest wisdom has the guise of simplicity [Nietzsche]
1. Philosophy / D. Nature of Philosophy / 7. Despair over Philosophy
Deep thinkers know that they are always wrong [Nietzsche]
1. Philosophy / D. Nature of Philosophy / 8. Humour
Comedy is a transition from fear to exuberance [Nietzsche]
2. Reason / D. Definition / 7. Contextual Definition
A contextual definition permits the elimination of the expression by a substitution [Dummett]
3. Truth / A. Truth Problems / 3. Value of Truth
Truth finds fewest champions not when it is dangerous, but when it is boring [Nietzsche]
3. Truth / A. Truth Problems / 7. Falsehood
Convictions, more than lies, are the great enemy of truth [Nietzsche]
4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets
The first-order ZF axiomatisation is highly non-categorical [Hallett,M]
Non-categoricity reveals a sort of incompleteness, with sets existing that the axioms don't reveal [Hallett,M]
4. Formal Logic / F. Set Theory ST / 7. Natural Sets
Zermelo allows ur-elements, to enable the widespread application of set-theory [Hallett,M]
5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
In classical logic, logical truths are valid formulas; in higher-order logics they are purely logical [Dummett]
6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / b. Types of number
A prime number is one which is measured by a unit alone [Dummett]
6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / c. Priority of numbers
Addition of quantities is prior to ordering, as shown in cyclic domains like angles [Dummett]
6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / a. Units
A number is a multitude composed of units [Dummett]
6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / e. Counting by correlation
We understand 'there are as many nuts as apples' as easily by pairing them as by counting them [Dummett]
6. Mathematics / A. Nature of Mathematics / 5. The Infinite / g. Continuum Hypothesis
The General Continuum Hypothesis and its negation are both consistent with ZF [Hallett,M]
6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / e. Structuralism critique
The identity of a number may be fixed by something outside structure - by counting [Dummett]
Numbers aren't fixed by position in a structure; it won't tell you whether to start with 0 or 1 [Dummett]
6. Mathematics / C. Sources of Mathematics / 6. Logicism / d. Logicism critique
Set theory isn't part of logic, and why reduce to something more complex? [Dummett]
7. Existence / C. Structure of Existence / 7. Abstract/Concrete / a. Abstract/concrete
The distinction of concrete/abstract, or actual/non-actual, is a scale, not a dichotomy [Dummett]
7. Existence / D. Theories of Reality / 2. Realism
Realism is just the application of two-valued semantics to sentences [Dummett]
8. Modes of Existence / E. Nominalism / 1. Nominalism / a. Nominalism
Nominalism assumes unmediated mental contact with objects [Dummett]
9. Objects / A. Existence of Objects / 2. Abstract Objects / a. Nature of abstracta
The existence of abstract objects is a pseudo-problem [Dummett]
9. Objects / A. Existence of Objects / 2. Abstract Objects / c. Modern abstracta
Abstract objects nowadays are those which are objective but not actual [Dummett]
It is absurd to deny the Equator, on the grounds that it lacks causal powers [Dummett]
'We've crossed the Equator' has truth-conditions, so accept the Equator - and it's an object [Dummett]
9. Objects / A. Existence of Objects / 2. Abstract Objects / d. Problems with abstracta
Abstract objects need the context principle, since they can't be encountered directly [Dummett]
9. Objects / F. Identity among Objects / 2. Defining Identity
Content is replaceable if identical, so replaceability can't define identity [Dummett, by Dummett]
Frege introduced criteria for identity, but thought defining identity was circular [Dummett]
11. Knowledge Aims / B. Certain Knowledge / 1. Certainty
Being certain presumes that there are absolute truths, and means of arriving at them [Nietzsche]
12. Knowledge Sources / E. Direct Knowledge / 2. Intuition
Intuition only recognises what is possible, not what exists or is certain [Nietzsche]
16. Persons / C. Self-Awareness / 2. Knowing the Self
Just as skin hides the horrors of the body, vanity conceals the passions of the soul [Nietzsche]
18. Thought / D. Concepts / 4. Structure of Concepts / i. Conceptual priority
Maybe a concept is 'prior' to another if it can be defined without the second concept [Dummett]
An argument for conceptual priority is greater simplicity in explanation [Dummett]
18. Thought / E. Abstraction / 1. Abstract Thought
Abstract terms are acceptable as long as we know how they function linguistically [Dummett]
18. Thought / E. Abstraction / 7. Abstracta by Equivalence
There is no reason why abstraction by equivalence classes should be called 'logical' [Dummett, by Tait]
We arrive at the concept 'suicide' by comparing 'Cato killed Cato' with 'Brutus killed Brutus' [Dummett]
18. Thought / E. Abstraction / 8. Abstractionism Critique
To abstract from spoons (to get the same number as the forks), the spoons must be indistinguishable too [Dummett]
19. Language / C. Assigning Meanings / 5. Fregean Semantics
Fregean semantics assumes a domain articulated into individual objects [Dummett]
20. Action / C. Motives for Action / 3. Acting on Reason / b. Intellectualism
People always do what they think is right, according to the degree of their intellect [Nietzsche]
Our judgment seems to cause our nature, but actually judgment arises from our nature [Nietzsche]
21. Aesthetics / A. Aesthetic Experience / 3. Taste
Why are the strong tastes of other people so contagious? [Nietzsche]
21. Aesthetics / B. Nature of Art / 4. Art as Expression
Artists are not especially passionate, but they pretend to be [Nietzsche]
22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / g. Moral responsibility
The history of morality rests on an error called 'responsibility', which rests on an error called 'free will' [Nietzsche]
It is absurd to blame nature and necessity; we should no more praise actions than we praise plants or artworks [Nietzsche]
Ceasing to believe in human responsibility is bitter, if you had based the nobility of humanity on it [Nietzsche]
Nietzsche said the will doesn't exist, so it can't ground moral responsibility [Nietzsche, by Foot]
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / b. Rational ethics
Intellect is tied to morality, because it requires good memory and powerful imagination [Nietzsche]
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / f. Übermensch
Originally it was the rulers who requited good for good and evil for evil who were called 'good' [Nietzsche]
22. Metaethics / B. Value / 2. Values / f. Altruism
No one has ever done anything that was entirely for other people [Nietzsche]
22. Metaethics / B. Value / 2. Values / g. Love
Simultaneous love and respect are impossible; love has no separation or rank, but respect admits power [Nietzsche]
22. Metaethics / B. Value / 2. Values / h. Fine deeds
We get enormous pleasure from tales of noble actions [Nietzsche]
22. Metaethics / C. The Good / 2. Happiness / d. Routes to happiness
We can only achieve happy moments, not happy eras [Nietzsche]
23. Ethics / C. Virtue Theory / 1. Virtue Theory / b. Basis of virtue
First morality is force, then custom, then acceptance, then instinct, then a pleasure - and finally 'virtue' [Nietzsche]
23. Ethics / C. Virtue Theory / 1. Virtue Theory / d. Virtue theory critique
You are mastered by your own virtues, but you must master them, and turn them into tools [Nietzsche]
23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / c. Motivation for virtue
The 'good' man does the moral thing as if by nature, easily and gladly, after a long inheritance [Nietzsche]
23. Ethics / C. Virtue Theory / 3. Virtues / a. Virtues
All societies of good men give a priority to gratitude [Nietzsche]
23. Ethics / C. Virtue Theory / 3. Virtues / c. Justice
Justice (fairness) originates among roughly equal powers (as the Melian dialogues show) [Nietzsche]
23. Ethics / C. Virtue Theory / 3. Virtues / f. Compassion
Pity consoles those who suffer, because they see that they still have the power to hurt [Nietzsche]
Apart from philosophers, most people rightly have a low estimate of pity [Nietzsche]
23. Ethics / C. Virtue Theory / 4. External Goods / d. Friendship
Many people are better at having good friends than being a good friend [Nietzsche]
Women can be friends with men, but only some physical antipathy will maintain it [Nietzsche]
23. Ethics / E. Utilitarianism / 1. Utilitarianism
In Homer it is the contemptible person, not the harmful person, who is bad [Nietzsche]
23. Ethics / F. Existentialism / 1. Existentialism
We could live more naturally, relishing the spectacle, and not thinking we are special [Nietzsche]
23. Ethics / F. Existentialism / 4. Boredom
People do not experience boredom if they have never learned to work properly [Nietzsche]
23. Ethics / F. Existentialism / 5. Existence-Essence
Over huge periods of time human character would change endlessly [Nietzsche]
24. Political Theory / A. Basis of a State / 3. Natural Values / c. Natural rights
If self-defence is moral, then so are most expressions of 'immoral' egoism [Nietzsche]
24. Political Theory / B. Nature of a State / 1. Purpose of a State
The state aims to protect individuals from one another [Nietzsche]
24. Political Theory / B. Nature of a State / 5. Culture
Culture cannot do without passions and vices [Nietzsche]
24. Political Theory / D. Ideologies / 5. Democracy / b. Consultation
If we want the good life for the greatest number, we must let them decide on the good life [Nietzsche]
25. Social Practice / A. Freedoms / 1. Slavery
Slavery cannot be judged by our standards, because the sense of justice was then less developed [Nietzsche]
25. Social Practice / D. Justice / 2. The Law / a. Legal system
Laws that are well thought out, or laws that are easy to understand? [Nietzsche]
25. Social Practice / D. Justice / 3. Punishment / a. Right to punish
Execution is worse than murder, because we are using the victim, and really we are the guilty [Nietzsche]
25. Social Practice / E. Policies / 1. War / a. Just wars
People will enthusiastically pursue an unwanted war, once sacrifices have been made [Nietzsche]
25. Social Practice / E. Policies / 5. Education / a. Aims of education
Don't crush girls with dull Gymnasium education, the way we have crushed boys! [Nietzsche]
25. Social Practice / E. Policies / 5. Education / b. Education principles
Interest in education gains strength when we lose interest in God [Nietzsche]
Education in large states is mediocre, like cooking in large kitchens [Nietzsche]
25. Social Practice / E. Policies / 5. Education / c. Teaching
Teachers only gather knowledge for their pupils, and can't be serious about themselves [Nietzsche]
26. Natural Theory / D. Laws of Nature / 1. Laws of Nature
In religious thought nature is a complex of arbitrary acts by conscious beings [Nietzsche]
26. Natural Theory / D. Laws of Nature / 11. Against Laws of Nature
Modern man wants laws of nature in order to submit to them [Nietzsche]
27. Natural Reality / C. Space / 3. Points in Space
Why should the limit of measurement be points, not intervals? [Dummett]
29. Religion / A. Polytheistic Religion / 2. Greek Polytheism
The Greeks saw the gods not as their masters, but as idealised versions of themselves [Nietzsche]
29. Religion / B. Monotheistic Religion / 4. Christianity / a. Christianity
Science rejecting the teaching of Christianity in favour of Epicurus shows the superiority of the latter [Nietzsche]
The Sermon on the Mount is vanity - praying to one part of oneself, and demonising the rest [Nietzsche]
Christ was the noblest human being [Nietzsche]
Christ seems warm hearted, and suppressed intellect in favour of the intellectually weak [Nietzsche]
29. Religion / D. Religious Issues / 1. Religious Commitment / a. Religious Belief
Religion is tempting if your life is boring, but you can't therefore impose it on the busy people [Nietzsche]