"the reason that war was declared"
"the grounds for their declaration"
"the reason a steady state was never reached was that the back pressure built up too slowly"
"we are told that man is endowed with reason and capable of distinguishing good from evil"
"his rationality may have been impaired"
"he had to rely less on reason than on rousing their emotions"
"he had no cause to complain"
"they had good reason to rejoice"
"there is reason to believe he is lying"
"We reasoned that it was cheaper to rent than to buy a house"
"The children must learn to reason"