In the older Indo-European languages, like Ancient Greek or Latin, evidentiality was also important and it was expressed using different verbal moods, like the so-called indicative, subjunctive and optative.
Many modern European languages have been simplified from this point of view, but some still have remnants of the older uses of the verbal moods, like the use of some kind of subjunctive for anything that is not known with certainty, e.g. from direct experience.
Many modern European languages have been simplified from this point of view, but some still have remnants of the older uses of the verbal moods, like the use of some kind of subjunctive for anything that is not known with certainty, e.g. from direct experience.