Argumentation Techniques
Modus Ponens (If-​Then Logic)

Build logical arguments using conditional statements and their confirmations.

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What it is

A fundamental logical structure following the pattern: If A, then B; A is true; therefore B is true. This creates clear, deductive reasoning that audiences can easily follow and verify, making it powerful for building logical arguments and demonstrating cause-effect relationships.

Before & after

Before

“Weak logic: "Good companies succeed, we're good, so we'll succeed." (assumes 'good' without proof)”

After

“Clear logic: "If we reduce response time, customer satisfaction improves. We reduced response time from 24 to 2 hours. Therefore, customer satisfaction should improve."”

When you’ll use it

Performance reviews: "If employees complete training, they get certified. John completed training. Therefore, John gets certified."

Project management: "If we miss the deadline, we pay penalties. We missed the deadline. Therefore, we pay penalties."

Quality control: "If products pass inspection, they ship to customers. This batch passed inspection. Therefore, this batch ships."

Sales processes: "If prospects attend demos, they receive proposals. Mary attended the demo. Therefore, Mary receives a proposal."

Pro tip

State your conditional clearly: 'If X, then Y.' Then confirm X to establish Y.

Questions & answers

3 questions

What is modus ponens or if-then logic in business?

Modus ponens uses if-then logical structure: if condition A is true, then result B follows. When ...

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How can I use if-then logic effectively in presentations?

Create clear conditional statements, provide evidence that conditions are met, show logical conne...

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What are common errors in if-then reasoning?

Common errors include affirming the consequent (assuming if B then A), denying the antecedent, fa...

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Learn more

Britannica - Communication
Britannica - Communication

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