Villain + math + stain-guide breadth
Shipped villain narratives ('plastic-jug-laundry-problem', 'the-residue-veil', 'both-say-free-only-one-actually-is'), problem-solution math ('20-cents-per-load-laundry-math', 'cost-per-load-laundry-detergent', '3-million-households-laundry-brief'), and stain guides (acrylic paint, blood, ink, juice, oil, mildew, slime).