Nietzsche on Argumentation
Human All Too Human - The Wanderer and his Shadow 7
To quieten the heart it isn't absolutely necessary to have solved the ultimate and outermost theoretical questions eg if confronting someone who is religious, rather say 'if the gods exist they don't concern themselves with us' instead of indulging in a fruitless disputation over the ultimate question of whether the gods do in fact exist. When confronted by a hypothesis that isn't easily questioned, introduce multiple hypothesis as the single hypothesis, being the only one visible is a hundredfold overrated. Reduced to their simplest form- if that is how things are they don't concern us; secondly, things may be thus but they may also be otherwise.