1) Bewilderment 2) Confusion 3) Ignorance 
• (n.) Want of comprehension or understanding.
In·com`pre·hen'sion noun Want of comprehension or understanding. 'These mazes and incomprehensions .' Bacon. 
[n] - an inability to understand
noun an inability to understand; `his incomprehension of the consequences`
lack of comprehension or understanding: The audience listened politely but with incomprehension.