Sales negotiation
At the end of the meeting, the salesperson does not ask "so, will you take it?" but "are you going for the standard package or the premium one?". The customer, invited to choose between two versions, thinks about the tier rather than about whether to buy, which they implicitly validate by answering "the standard will be enough".
Use the alternative when buying signals are present, offering two options that are genuinely acceptable to the buyer (never a real choice against a crude decoy). Frame the choice around a secondary arrangement (version, date, quantity) and let them answer without pressing.
Removes the "no" from the field of answers; leaves the buyer a sense of control; smooths the close down to a simple choice.
Detectable and worn thin when the two options are too visibly steered; a buyer can always take the third route: "neither one".