Even following basic syllogisms a learned skill
Plato's logos is a learned skill, absolutely. Although it's not a techné (a skill of practical application), but an reflection on the inner structure of thought. That's why he speaks about remembering in regard to the idea.Pathological people can't even follow their own trains of thought!
This is also why psychotherapy actually helps people to develop this skill, so that they can follow and influence their own logos.
Why should one call the distinction between different forms of negation obfuscation?