unsubstantiated• Beccaria's assumption of the special effectiveness of proportional deterrence is unsubstantiated.• However, recentresearch has shown that this particular anecdote is unsubstantiated.• So, not only is conductiveeducation theoretically unproven but also practically unsubstantiated.• The question of rumour and unsubstantiatedallegation is a much broader one.• It was time to deploy Dexter's tactic of unsubstantiated allegation.• Pathetic effort, the story's unusable, nothing more than an unsubstantiatedlibel.• unsubstantiated reports• Clearly the President's enemies are itching to believe unsubstantiated stories that could hurt him.