The time statements give a reader a recurring place to reset the scale amid technical exposition. Their usefulness comes from the change in physical conditions explained around them, rather than from date labels alone.
The passage makes the inferential gap visible: a known world becomes a small observable change, and the conclusion is restricted to what that change can support.
An attractive conclusion is followed by a specific route to misreading it. The passage makes uncertainty part of the inferential work instead of an unrelated disclaimer.
Reviewed examples have a source-linked editorial interpretation. Detected candidates are exact passages or structures retrieved by an explicit rule and still need interpretation. Neither label establishes a cause of bestseller longevity. No missing text is counted as a negative example.
