Copyright: fair-use factors

Elements that can be looked at to find "fair use" in copyright:

• Purpose and character of the use
• Nature of the workk
• Amount used--substantial amount or not?
• Effect on the market or value of the original work

Next, is it parody? (Parody requires reference/incorporation of the original work.)
Or, is it satire? (Satire makes fun of society as a whole, and shouldn't need to reference a single, specific work.)