I once read an anecdote about a person who was determined to prove that "purely theoretical" knowledge was just as good as actual experience, and to prove it, he was going to teach himself how to swim by reading about it. After acquiring what he felt was a sufficient "theoretical" knowledge of swimming, he jumped into a pool and was immediately able to swim, much to the amazement of onlookers.
It's probably false, though.
It's impossible to jump into a pool without learning something about swimming. At the very least, you start learning about how the water responds to your body. And this will remain true even if you don't consciously try. (There are experiments, for example, where people "learn" to twitch a muscle they can't consciously control because twitching it becomes correlated with turning off an annoying sound.)
Furthermore, it's been my experience that people who think they "can't explain something" really aren't trying. If you really try (an...
http://esr.ibiblio.org/?p=1192#more-1192
ADDED: Even if you disagree with ESR's take, and many will, this is the clearest definition I have seen on what qualia is. So it should present a useful starting point, even for those who strongly disagree, to argue from.