Four conditions jointly explain why a mutawatir report can yield certainty:
1. Sufficient numbers: so many transmitters that collusion on a lie is ordinarily impossible.
2. Continuity across generations: that multiplicity persists from the beginning to the end of transmission.
3. Sensory grounding: the original matter reported is based on hearing, sight, or another relevant sense.
4. Production of knowledge: the report yields certainty to its recipient.
The first three describe the character of transmission; the fourth identifies the intended epistemic outcome. The full category requires their conjunction, not one feature in isolation.