Knowledge: The cause of Down Syndrome is when one of the DNA is missing during the creation of a baby while Chronic Fatigue Syndrome happens when an individual is under a lot of stress, eats unhealthy and lacks sleep.

Conversation:
Have you ever heard of Chronic Fatigue Syndrome?
Yes, since the diagnosis depends on the person's symptoms.
Do you know the cause of that syndrome?

Response: Ah yes. When an individual is under a lot of stress, eats unhealthy and lacks sleep, the Chronic Fatigue Syndrome happens.