Impose a deadline and deliberation dies.
The mechanism is capacity. Petty and Cacioppo's model holds that careful evaluation of an argument requires both motivation and cognitive resources, and that when either is reduced, processing shifts to peripheral cues — the source's authority, the vividness of the framing, the number of arguments rather than their strength. Time pressure removes capacity directly.
Stress adds a second effect. Acute threat narrows attention to the threat itself and away from context, and degrades the working memory that comparison requires. Under a deadline, the question changes from is this true to what do I do now, and only one of those has an answer available.
The 2002 case is the best-documented instance of this at national scale. The White House Iraq Group was formed in August 2002 to coordinate the public case for war. Andrew Card explained the September launch to the New York Times in a sentence that is now the standard citation: from a marketing point of view, you don't introduce new products in August. Condoleezza Rice's formulation the same month supplied the urgency — we don't want the smoking gun to be a mushroom cloud — which converts an evidentiary question about whether Iraq had a weapons program into a scheduling question about how long one can afford to wait.
That conversion is the technique. A deadline does not answer the question; it makes the question expensive to ask.
The operational forms are familiar at every scale. The offer that expires tonight. The exploding job offer. The signature required today because the other party is flying tomorrow. The demand for a decision in a meeting rather than after it. The closing technique that requires the customer to be sitting down.
The boundary is whether the clock is real. Deadlines exist; supply is finite; other buyers do sometimes appear. Manufacturing urgency to prevent verification is the mechanism behind essentially every fraud in Part 5 of this guide, and in the 2002 case it prevented the examination of intelligence claims that turned out to be wrong.
There is also a professional cost to the operator: a target who discovers that the deadline was fabricated does not merely revise the deal, they revise the relationship.
The counter is a fixed personal rule rather than a judgment — chapter 304's discipline of refusing to decide anything significant inside the window.
Countered by The Right to Walk Away, The Call About Your Grandson, The Body Decides Before You Do