The quality of being a know-it-all.

Used to indicate that the response is probably no, but that the speaker is not entirely certain.

Someone who does not give a definite opinion in a questionnaire / Something one is uncertain about.

Alternative form of I don't know

(informal) To be acquainted with the normal process or procedure of a given activity or situation; to be familiar with how something is done.

The state of knowing nothing; ignorance. / A perverse admiration or embrace of ignorance.

In something's current form, which is familiar to the speaker and listener.

For success, and especially to obtain employment, one's knowledge and skills are less useful and less important than one's network of personal contacts.

(chiefly US, in negative constructions) To know something, even if only a little, about. / (chiefly US, idiomatic) To know nothing, or almost nothing, about.

The name of something the speaker does not want to mention, but which is known, or very likely to be known, to the listener. It can be plural (as in "... the you-know-whats").