How to say "又不是叫张海瞎" (yòu bú shì jiào zhāng hǎi xiā) in Chinese dialogue

“♪ You once said we'd live on, does that promise still count? ♪ My name is Zhang Haixia, ♪ If this is a gamble, put your life in my hands ♪”

“Just for the sake of argument,”