Quote Originally Posted by Dianeva View Post
I thought #1 meant that everyone should use reason. Or it could mean that everyone uses reason to some extent, but not with everything. That would make it true.
I think the idea is that many people only believe they're using reason, but number 1 is not allowing you to possess reason in itself as a means of attacking someone arguments. Even if their reasoning is fallacious, based upon emotional or biased conditions, or circular and under-examined, these must be reasonably addressed. You can't win an argument by virtue of controlling reason itself and defining reason by what you believe and defining illogical concepts by what you don't believe.