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.
(..) Good is a point of view, Anakin. The Sith and the Jedi are similar in almost every way, including their quest for greater power. The Sith rely on their passion for their strength. They think inwards– only about themselves. And the Jedi don’t? The Jedi are selfless. They only care about others. (..)2005 Star Wars: Episode III - Revenge of the Sith
(..) Hmm. Sit down. Leave us. ♪♪ Anakin, you know I’m not able to rely on the Jedi Council. If they haven’t included you in their plot, they soon will. I’m not sure I understand. You must sense what I have come to suspect. The Jedi Council want control ofthe Republic. (..)2005 Star Wars: Episode III - Revenge of the Sith