How does «samiʿtu ʿIkrimah» differ from «ʿan ʿIkrimah»?

Criticism of Transmitters: Misreporting, Claims of Hearing and Historical Evidence

• “Samiʿtu” expressly claims personal hearing
• Both explicitly assert direct audition in all cases
• “ʿAn” necessarily establishes deliberate lying
• “Samiʿtu” states only contemporaneity