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5.4.9 Style sheets. The first two practices are: "Use style sheets to control layout and presentation, unless the device is known not to support them." "Organize documents so that they may be read without style sheets." If I read these practices carefully, I think they probably don't conflict. But I think some readers might read these too quickly as "Use style sheets" and then "Don't use style sheets." For instance, suppose I want to achieve a particular layout. The right thing to do is to use style sheets (practice 1) but if I use a feature in a particular way so that turning the feature off would cause the content to become unreadable (practice 2), then I probably should not use the feature. But then have I violated practice 1 by not using it? I can't quite put my finger on it, but I think there is some dependency between the practices that needs to be made more explicit. For instance, I could read them as: Use style sheets to control layout and presentation (1) unless the device is known not to support them, AND (2) do so in a manner such that when turned off, the content remains readable. I wonder if this is an improvement: "Use style sheets to control layout and presentation, unless the device is known not to support them." "When using style sheets to control layout and presentation, organize content so that if the style sheets are turned off or not supported, the content may still be read." It is probably too long. Nonetheless, I think a slight clarification would help avoid confusion.