Reasonable is simply acting in line with whatever mythology your society has adopted. It's reasonable to kill people for insulting a sacred man (an act of passi

Reasonable is simply acting in line with whatever mythology your society has adopted. It's reasonable to kill people for insulting a sacred man (an act of passion) while elsewhere it's considered a right to do so (another act of passion). We "reason" using the cultural norms, and those norms are anything but actually norms, they are mythologies that makes societies function. You can not reason outside the cultural norms, like for instance you can't reason within Nazi cultural norms in modern Germany. It's impossible. Reasoning is simply a method to socialize with people with whatever cockamamie idea they currently consider a norm. Outside of that in certain other domains we have the ability to reason like for instance in engineering or programming, and there is no way to avoid reasoning about these things as they have very specific truth conditions... that are persistent and inescapable.