I didn't say the, I said a. What you refer to would be an aspect of rhetoric, another fundamental skill.

Coming from a language that doesn't really have articles, I was wondering if I should use "the" or "a". I think I could use both, because it cannot be proven that there is only fundamental skill with that property, or that they cannot support each other.

Anyway, my comment was a social commentary - it doesn't seem that pure logic is really what ultimately matters in human society, sadly. That is, if some other people are using logic wrong, you will also gain if you use it wrong in order to convince them.

Although I would also say that empiricism is much more important to rationalism (logic). There are many ideas that seem very logical, yet they are very bad, because people intuitively misunderstand some aspect of reality in their model.