Simple Slogans, Measured: Twin-Testing Taglines Before They Go on a Truck

Einfache Slogans bleiben haften, komplexe fallen ab

Proof, not claims—classic persuasion triggers, re-tested live with digital twins.

The takeaway: In Brainfluence (2011), in the chapter “Simple Slogans Double Sales,” Roger Dooley argues that simple slogans beat complex phrasing—a claim McGlone & Tofighbakhsh (2000) extend with their “rhyme as reason” thesis, which holds that rhymes come across as especially persuasive. In our test with digital twins, the shortest, most direct slogan clearly leads the pooled persuasion question; on memorability, the winner depends on list order. We asked a different question than the original study did about the rhyme thesis—our rhyme finding is a standalone side result:

Slogan	Memorability	Persuasion
„Banking. Einfach erledigt.“ (“Banking. Simply done.”)	50% (10/20)	70% (14/20)
„Konto klar, alles klar.“ (“Account clear, all clear.”) (rhyme)	40% (8/20)	15%
„Smart Banking für dein Business.“ (“Smart banking for your business.”) (Denglish)	5%	15%
Corporate slogan (complex)	5%	0%
Benefits list	0%	0%

Only one finding is order-robust: short beats long—the corporate slogan and the benefits list together capture just 1 of 40 picks across both questions. The memorability winner, by contrast, depends on list order: the rhyme wins run 1 with 8 of 10 picks, the direct slogan wins run 2 with 8 of 10; excluding the disclosed confabulated answers from run 2, the rhyme leads pooled (8 of 15 versus 7 of 15). A strong position effect further inflates the lead of „Banking. Einfach erledigt.“ (2/10 to 8/10 on memorability, 4/10 to 10/10 on persuasion, depending on whether the slogan is listed first or last)—but the direction “short beats long” holds in 3 of 4 individual runs and both pooled questions.

Dooley describes a trigger; we re-tested it with digital twins.

Do simple slogans really beat complex phrasing?

Roger Dooley devotes a whole chapter of Brainfluence to the topic: “Simple Slogans Double Sales.” The experiment in that chapter is actually a priming finding, though: savings-themed slogans there doubled hypothetical spending intent, from $94 to $184. The recommendation to prefer short, simple slogans over long, complex ones comes from the book’s fluency chapters—we’re testing that practical recommendation, not the priming experiment. Since 2000, it’s been backed up by psycholinguists Matthew McGlone and Jessica Tofighbakhsh: their “rhyme as reason” study shows that aphorisms with the same meaning are judged truer when phrased in rhyme. We wanted to know what’s still visible from both recommendations in a 2026 slogan test with digital twins—and whether “short” and “rhymes” serve the same goal.

Stylized recreation: memorability and persuasion weigh differently

For this, we built five slogan candidates for a fictional business-account brand called “KontoWerk”: a short, direct slogan, a rhyme, a Denglish slogan, a long corporate slogan, and a benefits list. All five competed head-to-head across two questions—one on memorability, one on persuasiveness.

How did we test this?

The Method: 10 digital twins (DACH consumer panel, ages 25–60) rated five slogan candidates for the fictional business-account brand “KontoWerk” across four independent, stateless calls: two questions (memorability, persuasion) times two reversed list orders. The panel responded in German; quotes are translated. 0 parse errors on the picks—every one of the 40 answers returned an unambiguous letter.

A strong position effect shows up on both questions: the winning slogan „Banking. Einfach erledigt.“ jumps from 2/10 to 8/10 (memorability) and from 4/10 to 10/10 (persuasion) as soon as it’s listed last instead of first. The direction—short beats complex—holds in 3 of 4 individual runs and in both pooled questions; the absolute size of its lead is inflated by list position, and that’s exactly how we’re reporting it.

In the second run of the memorability question, several answers cited slogan wording in their reasoning that never appeared in our test at all (confabulation)—4 of 10 according to the run log, 5 according to the flags in the audit JSON; we conservatively use 5. The letter picks themselves stayed unaffected and unambiguous, and were counted—but we don’t cite the affected reasoning as evidence in this article. Strip those 5 answers out of the memorability scoring and the pooled winner flips to the rhyme: 8 of 15 for „Konto klar, alles klar.“ versus 7 of 15 for „Banking. Einfach erledigt.“. One more caveat: the JSON format spec for every call included the example {‘pick’:’A’}—and A happens to be the direct slogan. That example may have created a constant pull toward A; the gap between A and the rhyme should be read with that caveat in mind.

Also important: the slogans were described as text, not shown as a rendered logo or campaign visual, and only a single fictional business-account scenario was tested—not a universal law for every industry. “Memorability” is also a same-session self-assessment (“which slogan could you still recall correctly tomorrow”), not an actual next-day recall test—and digital twins can’t forget anything within a session, so the question measures processing fluency more than genuine memory.

The panel: 10 digital twins*

Beate Hofmann, 58
Project manager twin* · Stuttgart · University degree

“I’m Beate Hofmann, a project manager from Stuttgart. Since my divorce I’ve found new stability with a new partner, and even though I’m living with chronic back pain and an active cancer diagnosis, I stay active with daily exercise and feel deeply satisfied with my life.”

What makes this twin distinct: I hold strong private religious beliefs without attending church, I’m deeply skeptical of politics and the economic situation, and I guard my data so carefully that I’ll pass up a discount rather than share it.