Clash & rebuttal
7.8/9.0
Con engaged Pro's strongest framing directly rather than its weakest phrasing, then
converted Pro's own concession into the decisive comparison.
Evidence — Con, R3: "the concession says it didn't"
Argument structure
8.2/8.6
Both sides carried a clean claim–warrant–impact chain. Pro's mechanism was the
sharper construction; Con's impact reached further.
Evidence — Pro, R2: "record the conclusion, not the discarded options"
Evidence quality
5.4/6.1
Weakest category for both. Pro asserted a promotion-velocity trend without a source;
the claim is flagged in the transcript and scored as unsupported.
Flagged — Pro, R1: "drops wherever it's measured"
Clarity
8.9/8.4
Pro's closing gave the judge an explicit decision rule, which is the single most
useful thing a closing can do.
Evidence — Pro, R3: "judge the mechanism"