وذهب الجاحظ إلى أن صدق الخبر مطابقته للواقع مع الاعتقاد بأنه مطابق
According to al-Jāḥiẓ, truth requires a report to match reality together with the belief that it does match reality.
Two requirements are combined: factual correspondence and a belief in that correspondence. An accidentally correct utterance does not meet the complete definition when the speaker thinks it is wrong.
If someone believes Zayd absent but says “Zayd is present,” and Zayd happens to be there, the report matches reality. Yet, on al-Jāḥiẓ’s account, it lacks the relevant belief condition for truth.