Anything that can be said with an insulting implication (I.e., <i>you are illiterate</i>) can be said more effectively without the personal abuse.<p>When multiple people miss the point you&#x27;re trying to make, it&#x27;s safe to assume that you haven&#x27;t made your point as clearly or convincingly as you&#x27;d hoped.<p>In which case it&#x27;s perfectly fine to respond and further develop your point, but your point will carry much more weight if you&#x27;re polite and respectful in the way you phrase it.