you dont know shit?

A stranger was seated next to a little girl on the
Airplane when the stranger turned to her and said,
'Let's talk. I've heard that flights go quicker if you
Strike up a conversation with your fellow passenger.'

The little girl, who had just opened her book, closed
It slowly and said to the stranger, 'What would you
Like to talk about?'

'Oh, I don't know,' said the stranger. 'How about
Nuclear power?' and he smiles.

OK, ' she said. 'That could be an interesting topic.
But let me ask you a question first. A horse, a cow,
And a deer all eat the same stuff - grass - . Yet a
Deer excretes little pellets, while a cow turns out a
Flat patty, and a horse produces clumps of dried
Grass. Why do you suppose that is?'

The stranger, visibly surprised by the little girl's
Intelligence, thinks about it and says, 'Hmmm, I have
No idea.'

To which the little girl replies, 'Do you really feel
Qualified to discuss nuclear power when you don't know
Shit?