Predictee
wise person = chachám (חכם)
Inaccurate?
clever Not everyone who is wise is clever. A name for a very wise person is a "sage".
Wise people.
Unless the prediction has been given a specific time to occur, most will eventuate because of the continued action(s) of a people,or person causing the prediction to eventually happen.
It makes the person wise.
Decides
meteorologist
Wise is an adjective, not a noun. It means a person of experience and sound judgement.
Wise person
it is a wise person