The preset is Design, Review, Design, Ship, review and Learn. It enables exact duplicate removal but leaves trimming and blank removal off and keeps current order. Because comparison is case-sensitive, Review and review are distinct. The second Design matches the first exactly and is removed.
Six physical lines enter unchanged
There are no blank rows or edge spaces in this fixture. With trimming off, the trimmed counter remains 0. With blank removal off, the blank counter also remains 0. This isolates duplicate behavior so the example can prove the comparison mode without another transformation changing the keys first.
Exact matching removes one Design
The first Design creates the exact key `Design`. The second occurrence matches and is removed, increasing the duplicate counter to 1. Review and review have different keys because ignore-case is off, so both survive. No other pair is equal. The output count becomes 5.
The original sequence stays readable
With final order set to Keep current order, the output is Design, Review, Ship, review, Learn. Every surviving line remains in its original relative position. The reconciliation is 6 input lines, 5 output lines, 1 duplicate removed, 0 blanks removed and 0 lines trimmed. Switching to ignore-case would intentionally remove lowercase review as well and must be reviewed as a different result.