Assistant Building

A symptom node represents an observable problem a user might encounter with a product.
 
Symptoms are presented to the user as questions with two answers. One answer reflects the "working" state, indicating that this problem is not present, and one reflects the "faulty" state, indicating that this problem is present.
 
Note that symptoms are named as positive statements that reflect the faulty state rather than as questions - for example, you may have a symptom that asks the user "Is there light from the lamp?" but the name of the symptom is "There is no light from the lamp." This is because in some circumstances, users are prompted to select from a list of symptoms; in these cases the positive statement is more clear.