Five Orders of Ignorance
from Philip Armour's "Of Jet Planes and Zeppelins"
0th Order Ignorance: Lack of Ignorance
I (probably) know something
1th Order Ignorance: Lack of Knowledge
I do not know something
2nd Order Ignorance: Lack of Awareness
I do not know that I do not know something
3rd Order Ignorance: Lack of Process
I do not know a (suitably effective) way to find out that I don't know something
4th Order Ignorance: Meta-Ignorance
I do not know about the FiveOrdersOfIgnorance
The only question regarding Hal, is whether he falls into the 3rd or 4th category above.