Key and Skinjo See Two Routes at a Railroad Turnout

From the public viewing terrace, Key held a small drawing where Skinjo could see it: one approach line meeting two possible paths. Far beyond the railing, the real turnout was almost lost in the weave of rails.

Skinjo traced the alternatives on the page with a fingertip, then looked up to find them in the distance. “This reminds me of our earlier cartography discussion,” Key said. “A map can show the choices without making the choice.”

Here, the distinction had a physical shape. A railroad turnout, also called a switch or set of points, connects tracks so a rail vehicle can pass from one route to another. Its movable points help determine which route is taken; the little sketch only made the alternatives easier to see. They stayed at the viewing rail, comparing the drawing with the distant junction rather than trying to turn a picture into a set of directions.