National Radio Institute home-study radio course ad, Weird Tales September 1941
The pattern
This still is filed under If-then promise.
Define
A conditional contract: if you do this, you get that. The sentence can be tested against the reader's own case.
Mechanism
Specificity does the persuading. The if names the action. The then names the outcome. Hedging kills it.
Verdict
We can name both the action and the result without adjectives
Why it works
In a page of competing small-space ads, the headline works as a job title the reader can picture himself holding, and the word RADIO is set largest so the ad is identified by category in a scan. Every line after that is a number: what men make a week, what you make while still learning, how many pages the book runs. The two objections that stop a coupon being cut are answered inside the coupon itself rather than in the copy, no salesman will call, and the book is free, so the reassurance arrives at the exact moment of hesitation. Naming the coming television business gives a mature trade a future tense, which is what justifies starting now.
Steal this when
Use this when you are buying small space and paying for every line, and the job is to trade a free, specific, countable lead magnet for an address. The layout rule to copy is that the whole ad is headline, three numbers and the coupon, with the objection-killers printed inside the coupon.