Sophia

NOUN
Noun:Sophia

(of a person, attitude, or action) not showing a proper sense of responsibility.
"it would have been irresponsible just to drive on"
synonyms: irresponsible reckless, rash, careless, thoughtless, foolhardy, foolish, impetuous, impulsive, devil-may-care, delinquent, derelict, negligent, harebrained; More
antonyms: sensible

We will not give you the knife because you are such a Sophia