What best contrasts sūʾ al-ḥifẓ and faḥsh al-ghalaṭ?

Criticism of Narrators: Fabricated, Abandoned, Munkar, and Defective Reports

• Weak retention is always deliberate lying
• Excessive error is merely a vocalization variation
• Weak retention is a less severe accuracy defect; excessive error is a grave pattern of mistakes
• Both are types of unknown status