Acquiring Character Traits -- Aristotle's Nicomachean Ethics

We are live-reading and discussing Aristotle's ~Nicomachean Ethics~, book VI chapter 13.
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1. What again is choice {prohairesis}?
2. What is going on desideratively, cognitively, when we choose one thing over another?
3. Why are character traits more like bits of knowledge?
4. When and how do we ever choose our character traits?
5. How do we know which character trait to choose?
6. At what point in our moral development can we say we have a character trait?
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The project's cloud drive is here, at which you'll find the reading texts, notes, and slideshows.