The aim of the article is to comment on Danielewiczowa 2002 book 'Knowledge and ignorance. A study of Polish epistemic verbs'. The author analyzes two of her semantic representations of epistemic verbs with propositional complements, viz. her representations of 'sadzi, ze' (believe that) and 'uwaza, ze' (roughly: is of the opinion that). While sharing Danielewiczowa's general semantic tenets and approving of the format of her representations as well as finding them extremely illuminating, the author points out certain elements in her analytic proposals which in his opinion require definite alterations. The author develops a pertinent argumentation in favour of his amendments and of his own definitions of the verbs in question.