Where the explanation breaks.

A related source that supports nothing

Question: did a technique improve accuracy? Retrieved text: a description of the technique. The source shares keywords but contains no comparison. A citation to it cannot establish the improvement.

Inspection rule: identify the exact sentence carrying the evidence, and check whether the claimed comparison exists.

A boundary that loses the exception

One chunk says a method works; the following chunk says under which conditions it fails. Selecting only the first can remove the qualification. This is a constructed example of why boundaries matter.

An abstract treated as a full review

An abstract reports the authors’ framing. It does not by itself reveal every evaluation choice, failure or limitation. Our paper notes display their reading scope so this distinction remains visible.