What's the difference between demand inference and supply inference?

What’s the difference between demand inference and supply inference?

Are you talking about supply and demand as in the Equity readings? Def need more input …

Yes, sorry, I am talking about demand and supply inference from Equity Readings There is a question about this in Schweser Book 6 sample exams, but I don’t really understand the explanation. If somebody could help me out, I’d be very grateful