Ideas of Harold Noonan, by Theme

[British, fl. 1989, At Birmingham University.]

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6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / c. Counting procedure
16014 It is controversial whether only 'numerical identity' allows two things to be counted as one
9. Objects / E. Objects over Time / 4. Four-Dimensionalism
16024 I could have died at five, but the summation of my adult stages could not
9. Objects / E. Objects over Time / 5. Temporal Parts
16023 Stage theorists accept four-dimensionalism, but call each stage a whole object
9. Objects / F. Identity among Objects / 2. Defining Identity
16016 Identity definitions (such as self-identity, or the smallest equivalence relation) are usually circular
16017 Identity is usually defined as the equivalence relation satisfying Leibniz's Law
16015 Problems about identity can't even be formulated without the concept of identity
16020 Identity can only be characterised in a second-order language
9. Objects / F. Identity among Objects / 8. Leibniz's Law
16019 Leibniz's Law must be kept separate from the substitutivity principle
16018 Indiscernibility is basic to our understanding of identity and distinctness