Basic SMS interaction example

• user: "Gaddafi was killed"
• system: "Do you know when?"
• user: "2 hours ago"
• system: "Do you know where?"
• user: "In Sirte, east of Tripoli"
• system: "Do you know who?"
• user: "NATO and US"
• system: "Do you know how?"
• user: "Air Bombing"
• system: "Do you know why?"
• user: "Cause Gaddafi is a bad guy."
• system: "Do you know more?"
• user: "no"

Screen sketches

The ugly blobs on the right of the messages are "thumbs up" and "thumbs down" icons.