What explicit qualification does Muslim give to the striking criticism of pious transmitters?

Narrator Criticism, Integrity and Precision: Standards of Scholarly Appraisal

• Akdhab entails deliberate fabrication by every pious transmitter concerned
• Muslim’s denial of intent also authenticates every report they transmit
• Inaccuracies pass their tongues without deliberate lying
• This criticism concerns only moral dishonesty, never precision or error