<p>One thing - I have to note here that intelligence is almost definitely altered by environment. Your brain responds to environmental cues just as does every other part of your body - muscles, kidneys, pen*s. Critical periods exist. If you were never exposed to language (the entire concept) as a child, you would have an absurdly difficult time learning it as an adult ([Critical</a> period - Wikipedia, the free encyclopedia](<a href=“Critical period - Wikipedia”>Critical period - Wikipedia)).</p>
<p>As an infant, most of your neurons are all wired together. As a result of environmental cues, your brain severs unnecessary connections between neurons as you slowly adapt to your environment. Moreover, just as with physical exercise, constant utilization of certain regions of your CNS will strengthen the neurons in that area and their connection with one another. Neurons that are not used will lose their connection with other neurons, and subsequently die off.</p>
<p>Following that, while your statement that intelligence is not <em>wholly</em> knowledge acquisition is true, knowledge acquisition almost certainly plays a part in your ability to realize your intelligence potential. It’s been proposed by many that in order to become a true “genius” in a field, prolonged and markedly early (childhood) exposure to that field must be present. Examples include chess world champions (almost all were child prodigies in chess), etc. (And as a side note, of course experience will play a factor into IQ tests - if you constantly train for IQ tests, your score will undoubtedly be higher, just as with the SAT - however, it is unquestionable that people do score differently on these tests, even with the same level of preparation. IQ tests without question do measure <em>something</em> - the argument is what exactly it is that they measure and to what extent. To posit them as wholly meaningless is a little on the absurd side.)</p>
<p>To read more about that, see [Environment</a> and intelligence - Wikipedia, the free encyclopedia](<a href=“Environment and intelligence - Wikipedia”>Environment and intelligence - Wikipedia) and read up on [Synaptic</a> plasticity - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Synaptic_plasticity]Synaptic”>Synaptic plasticity - Wikipedia), [Synaptic</a> pruning - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Synaptic_pruning]Synaptic”>Synaptic pruning - Wikipedia), and [Fluid</a> and crystallized intelligence - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Fluid_and_crystallized_intelligence]Fluid”>Fluid and crystallized intelligence - Wikipedia).</p>
<p>Incidentally, most of my concrete understanding of this field came out of a Neurobiology class and a Psychology class I took at Harvard last summer (I wrote my paper in Psychology on the ability of intelligence to be altered).</p>
<p>A little rambly of a post. To save myself a ****load of time, I’ve omitted thorough defenses of all the points put above.</p>