Can a valid argument have false premises and a false conclusion? false premises and a true conclusion?

Samuel johnson believed that literature should appeal mainly to the scholar, to him the common man, to teach him the common man, to teach and him the king and the parliament

You've arrived at the cafeteria! there is a trap door in the pantry which has been covered up by an atlas. choose the square which shows greenland to open the door.

What can a writer describe about two characters to develop their personalities? their communication the setting the exposition a transition