Sward, the lawn diagnostician that knows when it cannot tell

Field notes

Sward combines a lawn photograph with user answers, but deliberately limits how much the image can influence the result. Its diagnostic set is closed at sixteen causes, and a leading verdict requires both a 45% probability threshold and a 1.8× lead over the runner-up. When the evidence remains close, the app presents competing causes and supplies a physical check, such as peeling back a 30 cm turf square to look for larvae.