This is good advice. Whenever I'm sure I'm right, I try to get people to walk me through whatever they are proposing because I know they will eventually step through the problems that I see, but they don't yet.
But, you know, sometimes it turns out that I was actually the one not seeing some things clearly and by not coming out of the gate as a jerk about things we can both walk away having come to a collaborative solution and everyone feels good.
The best way I've found to do this is to them you don't understand something and have them explain the solution to you.
Plus it's humility practice -- you might even turn out to be wrong!