16014 | It is controversial whether only 'numerical identity' allows two things to be counted as one |

16024 | I could have died at five, but the summation of my adult stages could not |

16023 | Stage theorists accept four-dimensionalism, but call each stage a whole object |

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 |

16016 | Identity definitions (such as self-identity, or the smallest equivalence relation) are usually circular |

16018 | Indiscernibility is basic to our understanding of identity and distinctness |

16019 | Leibniz's Law must be kept separate from the substitutivity principle |