Although we learn what we learn from
personal experience, we usually learn what we learn from other people.
Consequently, learning is a social
activity, whether we immerse ourselves into what Etienne Wenger called a
community of practice (Wenger, Communities of Practice: Learning, meaning and
identity, 1999), learn what Michael Polanyi called tacit knowledge (Polanyi,
1962), and be able to complete, as Thomas Kuhn famously summarized, the
problems at the end of the chapter. (Kuhn, 1962)