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Daughter deciding to watch football with me...great!
Daughter stumping me with questions .... Booo

Daughter: Dad, what are those yellow lines?

Me: That is where they need to get for a first down.

D: How can they get painted and repainted so quick?

M: They don't. The computer generates the lines and they only show up on the television.

D: Well, how does the computer know where to put them?

M: Well there's a sensor in the ummm....which connects to....errr.....array...matrix thingy....and then ....yeah...the whoosit adjusts for camera angle by....ahhhh..
They are drawn in the computer by the first down fairies!

D: Gives me a you are an idiot look