I’ve noticed over the years, that there appears to be no important link between REASONING skills and IQ, though it does seem that those who appear to possess minimal skills of LOGIC often demonstrate the ability to store massive amounts of data without the ability or even the curiosity for understanding what they are LEARNING, if indeed that word actually fits the situation.
My observation persuades me also to believe that for those whose main tool for learning is rote memorization, new increments of stored data are often organized in the form of TAGS rather than traditional CATEGORIES. Notice how certain individuals, as they attempt to contribute to a conversation, sometimes, actually change the subject by linking to a TAG which leaps the boundaries of the conversation by jumping into a new CATEGORY.
I believe also that those, whose skills of LOGIC are more pronounced, require understanding of a new subject before choosing to store the new ideas; thus more CATEGORIES than TAGS are needed for this purpose. Quality is the watchword for those whose quest for information is TRUTH and UNDERSTANDING; VOLUME to a wannabe scholar may become the moral equivalent of GREED as experienced by a compulsive gambler.