Dave and Declan were walking home from the pub. Dave says to Declan, 'What a beautiful evening, look at the moon.'
Declan stops and looks at Dave, 'You are wrong, that's not the moon, that's the sun.' Both started arguing for a while when they come upon a real drunk walking in the other direction, so they stopped him.
'Sir, could you please help settle our argument?
Tell us what that thing is up in the sky that's shining. Is it the moon or the sun?' The drunk looked at the sky and then looked at them, and said,
'Sorry, I don't live around here.