Invention (Systematic Argument Discovery)¶

Why It Matters¶

The first argument you think of is rarely the strongest. Systematic invention prevents fixation on weak arguments and reveals options you'd otherwise miss. It's the difference between having one tool and having a full toolkit.

The Key Move¶

Use topoi (topics/commonplaces) as systematic prompts: definition (what is it?), comparison (what is it like/unlike?), relationship (what caused it? what will it cause?), circumstance (is it possible? what are alternatives?), testimony (who says so?). For each, generate arguments. Then select the strongest, not the first.

Classic Application¶

Legal brief writing. Lawyers don't just argue their first idea. They systematically explore every possible argument - precedent, statutory interpretation, policy implications, constitutional questions - then select the most promising. Invention ensures nothing is missed.

Surprising Application¶

Debugging and root cause analysis. When a bug appears, the first hypothesis is often wrong. Systematic invention means generating the complete hypothesis space: is it data corruption? logic error? timing issue? infrastructure? dependency change? Then test each systematically rather than fixating on the first idea.

Failure Modes¶

Generating arguments without filtering - quantity without quality. Using invention to rationalize predetermined conclusions rather than explore genuinely. Stopping invention once you find one good argument - the best might be the sixth. Treating invention as purely mechanical - judgment still matters for selection.

Go Deeper¶

Aristotle's "Rhetoric," Book II.23 on topoi. Young, Becker, and Pike's "Rhetoric: Discovery and Change."