name: reasoning-approach description: Two ways a loop or deck can reason — deductive (premise → conclusion) or inductive (evidence → pattern).
Reasoning approach
A loop — or a whole deck — reasons in one of two ways:
- Deductive. Premise → conclusion. The Claim is stated, then shown to follow from the evidence.
- Inductive. Evidence → pattern. Examples accumulate; the audience sees the pattern; the Claim is named at the close.
Both are valid. They produce different audience experiences and different risks.
Deductive
"X is true. Here is why."
The Claim arrives first; the loop defends it. Pyramid Principle and Consultant's Gambit are deductive at every level.
Strengths
- Fast. The audience knows the answer in slide one.
- Survives skimming and forwarding.
- Respects the audience's time.
Risks
- Lands flat if the Claim sounds presumptuous before evidence.
- Reduces the felt power of the aha moment — there is none, by design.
- Audiences who distrust the speaker may resist the upfront Claim before the case lands.
When to choose: time-poor audience, executive setting, prior credibility, recommend / inform decks.
Inductive
"Look at this. And this. And this. Now — see the pattern?"
Evidence accumulates; the Pattern Hunter loop is the canonical inductive shape. The Claim arrives at the close, often as the aha moment.
Strengths
- The tension and release is bigger.
- Audience feels they discovered the pattern themselves — buy-in is stickier.
- Works when the Claim sounds counterintuitive said cold.
Risks
- Slow. Audience may give up before the reveal.
- Vulnerable to skimming — if the reader reads only the first slide, they get evidence with no point.
- Fails the headline test if action titles describe examples instead of stating the building Claim.
When to choose: persuade or inspire decks, sceptical audience, counterintuitive Claim, time available.
Mixing the two
Most decks are deductive at deck level (the Big Idea is stated up front in the executive summary) and inductive at loop level (some loops earn an aha moment). Pure inductive across an entire long deck rarely works for executive audiences.
Failure modes
- Inductive at deck level for an executive audience. Wastes their time before the Big Idea.
- Deductive at loop level when the Claim is counterintuitive. Audience rejects the Claim before the case lands.
- Mixed without intent. Some loops headline-first, some buried-reveal, with no signal — the audience cannot calibrate when to listen for the point.
Canonical phrasing
Deductive respects time. Inductive earns belief. Pick by audience and stake, not by habit.