Yes, so you then practice the transitions between tiny parts, as well as starting at random points. Students who make unrecoverable mistakes in performances from memory often have to backtrack to the beginning of the previous part, because that’s all they ever practiced starting from. (Even when you’re not trying to memorize a piece, you’re still building up a mental model and you don’t always want things coarsely chunked.)
Yes, so you then practice the transitions between tiny parts, as well as starting at random points. Students who make unrecoverable mistakes in performances from memory often have to backtrack to the beginning of the previous part, because that’s all they ever practiced starting from. (Even when you’re not trying to memorize a piece, you’re still building up a mental model and you don’t always want things coarsely chunked.)