In reply to SenzuBean:
In that case, I am sorry for my earlier remark. It realy did seem like a poor troll.
Ask the people tellling you this, if you can use some other coloured holds and still call it a "clean" ascent, what would constitute a "dirty" ascent? More than 3 wrong holds? Five? More than two colours? Where would you stop?
It would be nice if I could climb green 4+ and claim the white 7a on the same line because I only used 'some' of the green holds and all the white!
In fact, I might try getting away with that next time........