hard · LSAT Logical Reasoning

Which one of the following arguments exhibits a flaw most similar to the flaw in the argument above?

1. Every trail that rangers cleared was later found entirely free of debris. This trail was found free of debris. So rangers cleared it.
2. Every trail that rangers cleared was later found free of debris. This trail was not cleared by rangers. So it must still have debris.
3. Every trail that rangers cleared was later found free of debris. Rangers cleared this trail. So it must be free of debris now.
4. Some trails that rangers cleared were later found to still have debris blown in in from nearby construction. This trail has debris.
5. No trail that rangers cleared still has any debris on it today. This trail has debris on it. So rangers cannot have cleared it.

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