CONCEPT
Epistemic Transparency
Seymour Papert's criterion for tools that reveal their own workings to their users—tools through which the relationship between human action and machine response remains visible, inspectable, and subject to understanding rather than merely to use.
Epistemic transparency is the property of a tool that lets you see how it works. Not its source code, not its engineering specification—the chain of causation between what you do to the tool and what the tool does in response. A hammer is epistemically transparent: swing it, and the relationship between your action and the nail's movement is immediate and visible. A hand plane is epistemically transparent: if it tears the grain, you can locate the cause—a wrong blade angle, an aggressive depth setting—and the diagnosis is possible because the mechanism is inspectable.
Seymour Papert formalized this concept in the context of educational computing, arguing that Logo was designed to be epistemically transparent in precisely this sense. Every command the child typed—FORWARD 50, RIGHT 90, REPEAT 4—had a visible and inspectable consequence in the turtle's movement. The child could check her commands against her own body: stand up, turn right ninety degrees, see if that was the turn she intended. This