Nice with the definition but i do not believe anybody can define intelligence. Its always vague from what i see.
I had noted that strategically shikamaru's feats agains't temari/tayuya is the greatest only rivalled by sasuke against deidora. To me its only this category of intelligence do they surpass others.
I actually do not believe in the IQ test in real life. I have asked to take one and i always decline because to me its not only futile it doesn't say anything.
Now there are many discussions that i do not like taking too much time on because i feel you cannot only change people's mind there is no right or wrong answer. You cannot prove them wrong. Example are these ranking threads. I hardly partake in them because how a member views a character will be different from another but also you cannot prove them wrong because your list isn't exactly official either.
But this is what ill say and ill say again. Itachi hasn't taken the IQ test. Will his score be high if he does?.
Most likely. How high?, i have no idea.
But again shikamaru's intelligence is mainly strategic, derived from natural intelligence. But you see he isn't the only one who has this natural intelligence. Loads of characters have natural intelligence. How they fare against shikamaru's natural intelligence i do not know. Example itachi [
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So you see itachi is also naturally very intelligent. The difference between these naturally intelligent people and shikamaru is that, they
LEARN. They broaden their viewpoint and knowledge by reading and attaining greater information, something shikamaru doesn't do.
Example it was said that itachi was reading scrolls about the founding of the village and all that by 7.
There is a difference between reading and a difference between reading and understanding. I will say the knowledge that 7 year old itachi had, accompanied with his natural intelligence was greater than 12 year old shikamaru who solely relied on natural intelligence and nothing else.
As i said madara, oro, itachi are all natural geniuses. But their intelligence goes beyond, just natural intelligence. They have attained and broaden their knowledge.