Supporting argument 03
Graduated and Less Restrictive Responses
Automated control in additive manufacturing should not be limited to the binary choices of printing a file or permanently refusing it. Potential harms differ in severity, probability, and certainty. A high-confidence attempt to manufacture an illegal weapon may justify immediate refusal, while a design that merely resembles a protected consumer product may call for a warning or verification. Adu-Amankwa and Daly identify the underlying problem: placing “open-textured laws in digital systems that prefer more binary approaches” is inherently difficult (Adu-Amankwa and Daly 590–91). A system that gives every suspected violation the same response ignores the contextual distinctions that law and morality require.
Graduated response in practice
Refuse. Pause. Verify.
REFUSE
PAUSE
VERIFYApply the reasonable-acceptability test
The Proportionate Refusal Framework instead asks whether each intervention could be reasonably justified to those who bear its consequences. Schur’s account of Scanlonian contractualism requires rules that affected people can justify to one another (Schur 86). Potential victims and rights holders can reasonably demand protection, but lawful users can also reject a rule that makes an unexplained algorithm the final judge of their work. A graduated system acknowledges both claims by increasing intervention only as the evidence and probable harm increase.
Use provenance and human review
Under this approach, a low-confidence match should trigger a private warning and explanation. A suspected licensed or safety-critical part could require an authorization check, digital signature, or provenance record. An ambiguous case could be paused for timely human review. Hard refusal should remain limited to high-confidence threats of grave harm when less restrictive measures would not be effective. A NIST report concludes that “Traceability is the key enabler to assure provenance and pedigree” (Stouffer et al. 8). Provenance can help verify that a safety-critical part came from an authorized source without treating every geometrically similar design as forbidden.
Reserve refusal for the last effective step
Graduated intervention is not weak enforcement. A warning may be inadequate for a credible weapon threat, just as permanent refusal is excessive for an uncertain intellectual-property match. Ethical control requires the least restrictive response that can meaningfully address the particular risk, together with an explanation and a path to human review. A printer should therefore say no only when saying wait, verify, or warn would not provide adequate protection.