 It is possible to accept Cross’s theory as a theory of how-questions only and to resist the final move of unifying how- and why-questions into a single species of question. The unification that Cross proposes assumes that why-questions can have contrast value 1, but Risjord (2000, 73–4) argues that instead of accepting that (35) is a why-question with contrast value 1, one can instead analyze it as a why-question with contrast value 0 that makes reference to the topics of other why-questions (also having contrast value 0) that have been or could be raised in the given context.