Fact or Fiction -- If its fiction, they need to use their imagination!

On the way to school in the morning E and I usually:

1. Do math, she will use my iphone to check our calculations of complex formulas like: "if you have 3 apples and you take 2 away, how many do you have, daddy?" (She likes math); or

2. She reads the letters from a sign or car or truck and will ask what that spells? (I am not good at this so she knows to play with mom and not dad); or lately

3. She wants to ask me if something is a fact or fiction. Here she suggests we listen to the talking man on the radio (which is NPR Morning Edition). The other day the show was recapping the Republican debate in which Rick Perry forgot the department of the federal government he proposed cutting and said "Opps."

This is how our conversation played out:
E: Is this fact or fiction?
Me: Well, that is a good question.
E: How come you tell me something is a good question and then don't answer?
Me: Because it is not easy to know how to answer all your questions.
E: Well, you said something was either a fact or fiction. (Note: we play opposites as well)
Me: Yes but it is not always easy to tell if someone is truthfully stating a fact or making something up, which could be fiction or could be just not telling the truth.
E: If this is fiction, they need to use their imagination!
Me: Now that is a fact!