Hypnotic Bait and Switch
Stating several uncontroversially true statements in succession, followed by a claim that the arguer wants the audience to accept as true. This is a propaganda technique and a logical fallacy where the audience lends more credibility to the last claim because it was preceded by true statements.
THE IDEA
Hypnotic Bait and Switch
Description: Stating several uncontroversially true statements in succession, followed by a claim that the arguer wants the audience to accept as true. This is a propaganda technique, but also a fallacy when the audience lends more credibility to the last claim, because it was preceded by true statements. The negative can also be used in the same way. This is a classic sales technique often referred to as “getting the customer used to saying ‘yes’!”
Logical Form: Several statements gain agreement. An additional conclusion is presented as if that agreement supports it, without a relevant connection.
Example #1: The sky is blue. Grass is green. Water is wet. Therefore, this product is the best on the market.
Example #2: You don't want to be unhealthy. You don't want to be poor. You don't want to be alone. So you should join this organization.
Explanation: The label “hypnotic” describes the momentum of repeated agreement. An audience may keep responding “yes” or “no” without checking whether the final claim follows from the earlier statements. The problem is the missing support for that claim; no literal hypnosis is required.
Exception: Good intentions do not make the inference valid. The author nevertheless endorses this persuasion technique in some circumstances, so if trying to convince your kids to stay off drugs, then manipulate away. But if you are trying to get someone to buy a vacuum cleaner, then take your hypnotic bait and switch and shove it up your reusable, hypoallergenic, dust bag.
Tip: When a pitch moves from easy agreement to a new claim, ask how the earlier statements support that conclusion.
When to use it
A salesperson uses a series of questions that the customer answers 'yes' to, then presents the product as the logical next step.
A politician lists several widely accepted facts before introducing a controversial policy proposal to gain automatic agreement.
A teacher gains agreement on several correct calculations, then uses that agreement to present an unrelated, unproved generalization as established.
A car dealer uses a series of positive statements about the car's features to distract from a known defect.
FROM THEORY TO EVERYDAY LIFE
In practice
Sales pitch using yes-ladder
The sky is blue. Grass is green. Water is wet. Therefore, this product is the best on the market.
Negative version in recruitment
You don't want to be unhealthy. You don't want to be poor. You don't want to be alone. So you should join this organization.
A MOMENT TO REFLECT
Put it to work.
Can you recall a recent advertisement or political speech that used a series of true statements to lead you to a questionable conclusion?
How can you train yourself to become a 'human fallacy detector' and resist emotional manipulation?
When is it acceptable to use this technique, such as in parenting, and when is it unethical?
CONTINUE THE CONVERSATION
Source texts
- Logically Fallacious - The Ultimate Collection of Over 300 Logical Fallacies