Verify a style sheet is preferred when the rel attribute of the LINK element is set to "stylesheet" and the title attribute of the LINK element is set. A style sheet is alternate when the rel attribute of the LINK element is set to "alternate stylesheet" and the title attribute of the LINK element is set.
Test for assertion 14.3.2-6, 14.3.2-7

This paragraph shall be underlined but NOT red because underline.css is a preferred style sheet but red.css is alternate.