Perfect! May it be a vague, wandering walk, so you can enjoy the scenery smile emoticon x (algebra) is metaphorical. People often don't realize, in this days of the Glorification of all things Mathematics,that numbers themselves are metaphors - stand-ins for another concept. Yet we treat them as-if they have substance of their own, but they don't, except as a system when in use. But I must express my bias here. I made a book that nobody will buy because it's a mess. While everybody is looking to improve the specificity of things, I look to see what things have in common; INTENTIONALLY exposing their vagueness and metaphorical value. Over a weekend once a few years ago, I took the largest available English thesaurus used by linguists and such, and cross-referenced all of it to itself, to see what happened. I found a pattern. What is the meaning of this pattern? I don't know, except that in SOME WAY, each of the words in the 5 ... categories I guess that emerged, have _something_ in common with each other.