Explain the behavior or goal of the following program (mystery/3). What would it be the result of the query below? mystery(A, B) :- mystery(A,[],B). mystery([X|Y],Z, W) :- mystery(Y,[X|Z],W). mystery([],X, X). ?- mystery([1,2,3], A).

answer; (& & );

you can not change you age soon as you signed up. the only way is too delete your account and use another account to sign up and put your correct age.

i've had the same problem. i generally just ignore it, as a ton of these "verified answers" are completely wrong.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?