The dictionary definitions and the synonyms of the two words:
And please tell me, just how long did it take for you to go around Dictionary Shopping to find one reference that gives your argument credence?
I will tell you, I purposefully attempted to seek out such a definition that included Intelligence, and after going through 12 dictionaries, I came up empty-handed and gave up.
Obviously you are either far more persistent to try to find a source out there that agrees with you, or you are luckier than I am. (Dictonary.com, M-W.com, Wiktionary, thefreedictionary.com, yourdictionary.com, alphadictionary.com, askoxford.com, encarta.msn.com, dictionary.cambridge.org, wordsmyth.net, ARTFL Project (Webster Dictionary, 1913), Allwords.com)
Dexterity is rooted specifically in the use of the hands, and describes physical skill, coordination, and quickness. It's use has grown to be used metaphorically to describe skill and quickness in general (such as mental quickness).
What you are arguing is that because Dexterity is metaphorically applied to intellectual skill as well, that we should base intellectual skills based on Dexterity.
This is despite the fact that D&D has ALWAYS been about having 3 attributes that were physical, and 3 that were mental. Strength, Dexterity, and Constitution are meant to be for physical skills. Intelligence, Charisma, and Wisdom are meant to be for mental and social skills.
Or maybe I should just take up your method of logic, and say that we get rid nearly all attributes and just keep 2 attributes, Constitution and Smart!
Smart replaces Strength:
2: marked by often sharp forceful activity or vigorous strength
Smart replaces Dexterity:
3:
brisk,
spirited <a
smart pace>
Smart replaces both intelligence and wisdom:
4 a
: mentally alert
: bright b
: knowledgeable c
: shrewd
Smart replaces Charisma:
6 a
: neat,
trim <soldiers in
smart uniforms> b
: stylish or elegant in dress or appearance c (1)
: appealing to sophisticated tastes (2)
: characteristic of or patronized by fashionable society
Now we have 1 skill based on Con (Endurance), and all the other skills, social, mental, and physical (except Endurance) can all be based on Smart.