Stranger : i am from the year 2031
you may ask 3 questions
You : what is air?
You : tell me now
You : wut? 2013?
Stranger : That counts as question one
Stranger : Air is a mixture of nitrogen, oxygen, and dust created by sediment erosion on earth. It only exists in the 'air' form on earth. It contains mostly deionized N2
I was like what??? I don't really know what he/she was talkin' about.