` ``Siamese cat`` is capitalised, whilst ``house cat`` is not. You made one of the best points that I saw during the ``Genesis Creation myth`` debate; that whilst ``myth`` was technically correct, it was misleading, as the public generally understands myth to mean false. Extremely different scenario; exact same analogy. ``Thoroughbred``, in most cases, including racehorses, is referring to a purebred horse, and not a specific breed.`