'Suppose' in the Bible

I say, ‘Your plan and strength for the war are only empty words.’ Now in whom do you trust and on whom do you rely, that you have rebelled against me?

Suppose you say to me, ‘We trust in the Lord our God.’ Isn’t He the One whose high places and altars Hezekiah has removed, saying to Judah and Jerusalem, ‘You are to worship at this altar’?