The Ballpoint Incline

A metal cylinder lay across the ruled pages, obstructing my advance. Upon deliberate tactile inspection, it rolled exactly twelve millimeters before lodging against an eraser crumb. A hexagonal ballpoint pen. Highly functional. I calculated the slope, braced my heels against the paper binding, and leveraged the barrel into a horizontal barricade. Now the perimeter is secure against rogue stationery. Systematic progress.