What are intelligible facts? how are they different from opinions?

What new form of music swept the nation in the 1950s a. chamber music b. hip-hop c. jazz d. rock-and-roll

Because of the housing bubble, many houses are now selling for much less than their selling price just two to three years ago. there is evidence that homeowners with virtually identical houses tend to ask for more if they paid more for the house. what fallacy are they making?

Which example define natural rights ?