We often use the term "argument" to refer to a squabble over disputable matters, which the Scriptures command us to avoid. (cf. Rom 14:1, 2 Tim 2:23, et al.) But in a technical sense an argument is a reasoned, logical argument; something we must do and which God Himself models for us in this text from Isa 41:1-29. Sermon begins at about 23:20.