Sources and Methods is a conversation show with two hosts, Alex and Matt, and a guest they want to understand from the inside. The guests don't share a field. What they tend to share is an interest in how people learn, and in who ends up knowing what. Eva Hagberg comes on to talk about 'How to Be Loved', a memoir about family and illness that the hosts call personal and that also takes in the health care system. The conversation turns to her time teaching architecture writing seminars at eight in the morning. She tried to make reluctant students care by starting from the personal, with daily journals about their rooms and drawn plans of their houses back home. She is sharp about the opposite reflex: the hand-wringing that decides nobody cares anymore and stops investing. Jeremy Howard, a co-founder of fast.ai, describes a project of subtraction. Five lines of code become three, then one, then possibly a button, because each line removed is a decision the user no longer has to make. The hosts praise fast.ai for taking deep learning beyond Silicon Valley insiders to domain experts in fields like medicine and history. In '36: Thomas Nichols', a professor of national security affairs makes a direct case about expertise. When citizens opt out of learning how things work, he argues, a small group of experts gets rewarded by default, not by conspiracy, and resentment builds between them and everyone else. He also names the book he rereads every year, C.S. Lewis's The Screwtape Letters. 'Learning the Abacus with RightLobeMath' turns to the soroban. The guest cites international math rankings, private abacus schools in India, Japan and China, and research on early math, and argues that this is one problem technology genuinely fits. Then there are the episodes without a guest. '35: Alex & Matt' wraps up 2016: the hosts name guests who intrigued them, catch up on their own work and joke that a listening milestone might just be spam bots. It also makes room for a more serious exchange about whether the lessons of international intervention in Afghanistan have been learned. In another catch-up, Alex mentions language coaching work in Jordan and a book of Taliban documents he published. The register is informal: one host will cut in on the other, and they admit when they are unsure of a detail. Show notes at sourcesandmethods.com link to the books and articles that come up. A listener drawn to technology could start with Jeremy Howard, and one more interested in civic life with Thomas Nichols.