<prompt> Doctrine of common knowledge is a variant ofMedical maloccurenceRes ipsa loquiturNovus actus interveniensCalculated risk doctrine  <response>: Doctrine of common knowledge Doctrine of Common Knowledge - It is based on the assumption that the issue of negligence in the paicular case is not related to specialized knowledge or technical matters of the medical profession, but an act involving application of common knowledge. - Expes may not provide evidence regarding matters of common knowledge. - It is a variant of res ipsa loquitur 