What Bob is discribing here is known as "Moinds 4th postuate":
The degree of certainty in one's level of competency is inversely proportional to the actual level.
1.The hopelessly incompetent are absolutely certain of their abilities.
2.The competent always have sensible doubts, precisely for the reason the can realistically assess the situation.
3.The incompetent never realize they are incompetent, precisely for the reason that they lack the competence necessary to discern the difference.
4.The work of the incompetent tends to be superficial and bombastic. By extension of the Corollary 3, they are completely unaware of this and usual regard their work as profound and important.