Hitch Hiker's guide is a great satire. Not a great source for science.
Devilesk, you're right. Most words can't be 100% concrete, but they can be like 90% concrete, or at least detailed enough to not be classified as "Vague". Which is the main reason why I think we should add in more details. Make things LESS vague, to the point where they're not really vague anymore.