1. (difficult) I didn't understand the selection of delta in the last section, and delta becomes a much more used term in this section and in proving the limits of functions. I am starting to see the patterns that develop in choosing delta, but no real explanation has been given here either.
2. (reflective) Deleted neighborhoods is an interesting concept, and I think the name for it is what causes it to seem difficult at first, but is entirely easy to understand upon examination. The images they use to describe it remind me of function mapping from earlier sections.
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