I asked five people the following six questions:
- What colour are Maddy's eyes?
- What is the cat's name?
- How old is George?
- Who is Fiona's favourite author?
- Where does Uncle Bill keep his guitar?
- Is Pete teetotal?
And I received the following answers:
Maddy: 1. Black, 2. Fluffy, 3. 40, 4. Dickens, 5. Study, 6. Yes.
Helen: 1. Green, 2. Snowy, 3. 41, 4. Hemingway, 5. Study, 6. No.
George: 1. Blue, 2. Tiddles, 3. 43, 4. Hemingway, 5. Bedroom, 6. Yes.
Fiona: 1. Grey, 2. Fluffy, 3. 40, 4. Hemingway, 5. Dining Room, 6. No.
Pete: 1. Grey, 2. Tiddles, 3. 43, 4. Shakespeare, 5. Dining Room, 6. Yes.
Each of the five people questioned have answered two questions truthfully and four questions untruthfully. Furthermore, every question has been answered truthfully by at least one person.
What facts can be deduced with certainty?
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