[scardine]

You can also take the socratic approach and just ask good questions instead of making statements.

Sometimes you don't even have to ask, just mirror your counterpart (repeat his last statement as a question) and make good use of silence. Wu wei all the way.

[kartickv]

One the quotes that matters most to me and that I apply in my daily life is:

Judge a man by his questions rather than this answers.

Even if you've asked the right question, and lost, you're better off than not having asked the question at all.

[rukuu001]

Yes! I am by nature non-confrontational, but this is how I dissent in a discussion without getting into a heated argument (when the possibility of changing minds goes out the window anyway).

This is still difficult, but better than staying quiet or lying, a path to self-contempt.