You and I have plenty of challenges with our present and future.
He, your father, I know him... if he challenges him to a duel will that be all right?
His challenges on the mortal realm alone were overwhelming.
Ii., entitled " The Relation of the Paschal Chronicle to Malalas," challenges Professor Carriere's arguments, and contends that the History of Moses is a late 5th-century work, much interpolated in the immediately succeeding centuries.
Thus, governments are very sensitive to criticism and to challenges to their authority.