(n.) Quality or state of being shallow.

a little learning absentmindedness amateurism appearance big deal carelessness dilettantism dilettantship disregard disregardfulness distraction emptiness exteriority externality externalness extrinsicality flightiness flimsiness flippancy fluffiness foolishness foreignness frivolity frivolousness frothiness futility giddiness glimmering glimpse half-learning heedlessness idleness imperfect knowledge inadvertence inadvertency inanity inattention inattentiveness inconsideration incuriosity indifference inobservance lack of depth levity lightmindedness lightness manner mien negligence nonobservance nugacity obliviousness openness outerness outward appearance outwardness regardlessness sciolism seeming semi-learning shallow-wittedness silliness slenderness slight knowledge slightness smattering smattering of ignorance smattering of knowledge superficiality surface-scratching thinness thoughtlessness triflingness triteness triviality trivialness unalertness unawareness unconsciousness unheedfulness unintentiveness unmindfulness unobservance unprofoundness unprofundity unwariness unwatchfulness vacuity vague notion vanity vapidity volatility