Hide-whens are bound to paragraph, not to a field. A paragraph that contains a field may contain other things. If the hide-when applies to the paragraph only, then what about the other stuff. Surely there can't be two hide-whens, one for the field and one for the paragraph. What if they evaluate to contradictory hide states? And if it still applies to the whole paragraph, what about the case where there are two fields in the paragraph? Which field gets the honor of having @thisName apply to the paragraph's hide-when?