agnosticism
blank mind
blankmindedness
blankness
callowness
calm of mind
childishness
emptiness of mind
empty-headedness
fallow mind
fatuity
foolishness
greenhornism
greenness
hiatus of learning
ignorance
ignorantism
ignorantness
immaturity
imprudence
inability
inadeptness
inadequacy
inadvisability
inanity
inaptitude
inaptness
inattention
inattentiveness
incapability
incapacity
incompetence
incompetency
inconsideration
indexterity
indiscreetness
indiscretion
ineffectiveness
ineffectuality
inefficiency
ineptness
inexpedience
inexperience
injudiciousness
innocence
irrationality
know-nothingism
knowledge-gap
lack of information