Hasan li-Dhatih: The Intrinsically Good Hadith

Immediately below the sahih in the hierarchy of accepted hadith is the hasan li-dhatih — the intrinsically good or fair hadith. This category was notably articulated and championed by Imam al-Tirmidhi (d. 279 AH), who frequently used the designation hadith hasan in his celebrated collection al-Jami' al-Sahih. Ibn Hajar builds on this tradition and defines the hasan with precision.

The hasan li-dhatih meets all the conditions of a sahih hadith with a single exception: the full precision (tamm al-dabt) of at least one narrator in the chain falls slightly short. The narrator in question is reliable and honest — not a liar, not a person of reprehensible innovation, and not known to commit serious errors — but his memory or precision does not reach the level required for sahih classification. He may have a slightly deficient memory compared to the most precise narrators, or he may not be as well-attested in that particular category of knowledge.

The critical distinction between sahih and hasan is therefore one of degree, not kind. Both are accepted reports obligatory to act upon. The difference lies in the level of confidence: a sahih hadith carries greater evidential weight and is preferred when there is a conflict between a sahih and a hasan narration of the same content.

Ibn Hajar notes an important point about the term hasan: scholars have used it with at least two distinct meanings that must not be confused. In the context of hadith grading, hasan is the technical term described above. However, some scholars also use hasan as a general evaluative term meaning "good" or "pleasing" in a non-technical sense — for example, when a scholar says a hadith's chain is hasan, he might mean it has a pleasant or attractive chain structure rather than assigning it to the technical hasan grade.

The ambiguity in the term hasan has caused confusion in the tradition. Al-Tirmidhi's own usage of hasan was the subject of extensive scholarly commentary, with later scholars sometimes disagreeing about whether specific hadiths he labeled hasan meet the technical criteria or represent a more general usage. This ambiguity is one reason why the science of hadith grading requires careful attention to the definitions used by individual scholars rather than assuming uniformity of terminology across the tradition.

The hasan hadith is fully usable as legal evidence (hujja) and is preferred by many jurists over rational analogy (qiyas) when the two conflict, following the methodology of the scholars of hadith and the majority of jurists. Its status is secure and distinguished from the weak (da'if) category, which will be addressed in subsequent chapters.