Jen and Ido get delightfully nerdy with The Thumbwriter, a listener’s thumb-first, radial keyboard idea. They explore phonetic vs. statistical letter clusters, a two-thumb “gear shift” for sets, and adaptive arcs that follow your actual thumb. Expect haptic cues, digraph flicks, scrub-to-undo, and a “de-emphasize, don’t hide” approach to prediction. Surprises include a visible assist meter, calm/spicy modes, and a friendly training garden that might finally tempt you off QWERTY.