The limits to such free speaking fall within the existing exception of unambiguous impropriety, which «applies only in the very clearest of cases». (newlawjournal.co.uk)
It's truly ironic that the field responsible for branding has a brand identity that's about as unambiguous as Facebook's 58 gender options. (entrepreneur.com)
It's important to keep in mind that fights over many questions — whether any danger is posed by traces of industrial chemicals detected in human tissues, for instance — get most heated in the absence of unambiguous evidence in either direction (safe or dangerous). (dotearth.blogs.nytimes.com)