Andrew Hearst and Zach Cutler know their ventures will take persistence, something economist Nake Kamrany says all entrepreneurs need, regardless of age.

VOA: standard.2010.01.31

And we need to get clear on the nature of identity or persistence or, more specifically, personal identity.

同时还要弄清同一性及,持存的本质,具体说来就是,个人同一性

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