As a Christian, how much can we ‘outsource’ (rely on historical account, science, etc.), and how much scripture needs to be included to refute these heresies?

/in /by

In our lives, we may ‘outsource’ our faith. Today’s society teaches humanism, creationism, and so many other issues as truth. As a Christian, how much can we ‘outsource’ (rely on historical account, science, etc.), and how much scripture needs to be included to refute these heresies? 

Must be 250 words with citation