You could always 'rely on' [='count on'] him to disagree. [=you could always be sure that he would disagree]
The economy may improve next year, but it's not something you can 'rely on'.
They 'rely on' a well for all their water.
(..) but she does have an excellent territory, rich in food and water. Although the cubs are now as large as their mother, they still rely on her for their food. It will be another year before the cubs can hunt for themselves. Without their mother's skill and experience (..)2006 TvShow: Planet Earth Title: Mountains Season: 1 Episode 2