>read ignorance as a lack of knowledge - not the voluntarily action to ignore. Same thing. You cannot do anything with just "lack of knowledge", whereas you ca

>read ignorance as a lack of knowledge - not the voluntarily action to ignore. Same thing. You cannot do anything with just "lack of knowledge", whereas you can do lots with either "knowledge" (e.g process it and extract more knowledge, conclusions, dis/prove theories etc) or curiosity (e.g obtain knowledge). Lack of knowledge is passive. Curiosity is active.