4 ideas
18189 | ZFC could contain a contradiction, and it can never prove its own consistency [MacLane] |
17606 | Axioms reveal the underlying assumptions, and reveal relationships between different areas [Kline] |
12695 | Epicurean atomists say body is sensible, to distinguish it from space. [Garber] |
12705 | Epicurean atoms are distinguished by their extreme hardness [Garber] |