you're being too logical about it.. and about abstraction no
   less. No fun*tongue emoticon* Play a game of opposites and you
   can see how it can work: What would be a tangible abstraction?
   Art. You can touch it yet it's an abstraction. What would be an
   intangible specification (which is one of the opposites of an
   abstraction)? Or something intangibly concrete (another opposite
   of abstraction)? A good example of intangibly concrete for many
   would be logic for example. Can't touch it, but it's considered
   concrete - as in "fact". It's not as ridiculous as it at first
   seems. -- *Its not that it CAN'T be seen as a pleonasm if you
   like.* - It can and that viewpoint would not be invalid. But it
   wouldn't be complete to me, as it's stopping short of other
   options.