著者

青山 拓央

出版者

The Philosophy of Science Society, Japan

雑誌

科学哲学 (ISSN:02893428)

巻号頁・発行日

vol.43, no.2, pp.2_81-2_94, 2010 (Released:2011-04-01)

参考文献数

6

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Achilles need not catch the tortoise, although Achilles is faster than the tortoise. Zeno's premise does not determine whether Achilles can catch up. In this paper, I clarify this fact through a critical examination of Noya (2005), which criticizes Aoyama (2002) and Uemura (2002). Noya's solution smuggles the unnecessary premise of equal ratio to make Achilles catch up. However, his solution gives a new idea about what speed is. In the last part of this paper, I develop this idea and explain the reason why Achilles usually catches up in the actual world.