An wiki page (https://en.wikipedia.org/wiki/Epistemic_modality) explains "epistemic modality" as
a sub-type of linguistic modality that deals with a speaker's evaluation/judgment of, degree of confidence in, or belief of the knowledge upon which a proposition is based.
It seems the word "epistemic" is related to "inference" or "prediction".
could someone give some simpler explanation about the meaning of "epistemic", difference between epistemic and predictive?