To sue in federal court, a plaintiff must ordinarily show an injury that is concrete and imminent rather than conjectural. This requirement is meant to keep courts from issuing advisory opinions. It becomes troublesome, however, when regulation addresses probabilistic harms. Exposure to a toxin may increase disease risk without making illness certain; a data breach may increase the chance of identity theft before any fraudulent charge appears. If courts demand completed harm, preventive law can become least enforceable precisely when prevention succeeds.

Some judges respond by treating any increased risk as injury. That approach goes too far. Everyday decisions alter tiny probabilities, and a plaintiff should not acquire standing merely by describing a remote possibility in statistical language. The relevant question is whether the defendant's conduct created a material risk of the kind the statute or duty was designed to prevent.

Materiality cannot be reduced to a universal percentage. A one-in-a-thousand chance of a trivial inconvenience differs from the same chance of fatal disease. Evidence also matters: a risk estimate derived from a tested exposure model deserves different treatment from speculation unsupported by dose or pathway. Courts already combine magnitude, severity, and evidentiary reliability when deciding preliminary injunctions; standing need not pretend those dimensions are incommensurable.

Recognizing a material risk as injury would not decide the merits. A plaintiff might establish access to court yet fail to prove causation, breach, or entitlement to relief. Keeping those inquiries distinct prevents the standing threshold from swallowing the substantive law. It also avoids the opposite error of converting every asserted anxiety into a judicial case.

The proposal is thus neither completed-harm formalism nor unrestricted risk standing. It is a disciplined inquiry into whether reliable evidence shows a nontrivial threat to the legally protected interest at stake. Courts would remain barred from answering abstract policy questions, but they would not have to wait for preventable harm to mature before acknowledging an injury.

Remedy must also fit the probabilistic injury. Recognition of standing to seek improved monitoring does not automatically justify damages calculated as though disease had already occurred. A court can acknowledge a present material risk while tailoring relief to information, testing, exposure reduction, or another measure that addresses uncertainty. This remedial flexibility weakens the claim that risk standing necessarily awards compensation for injuries that may never mature.

The hardest cases involve disputed baselines. A risk may be substantial relative to a person's prior exposure yet small relative to background hazards everyone faces. Neither comparison should automatically control. The statute's protected interest and the defendant's contribution identify the relevant baseline: a law regulating unauthorized disclosure may make the incremental risk from that disclosure salient, while a duty aimed at population health may require comparison with total exposure. Materiality is therefore legal as well as numerical. That feature invites judgment, but completed-harm rules also embed judgment by deciding that prevention counts for nothing until it fails.