The predication is formal if the subject necessarily entails (or excludes) the predicate; it is material if the entailment is contingent.(2nd paragraph)
Explanation:
The definition of a prediction is a forecast or a prophecy. An example of a prediction is a psychic telling a couple they will have a child soon, before they know the woman is pregnantA prediction is what someone thinks will happen. A prediction is a forecast, but not only about the weather. Pre means “before” and diction has to do with talking. So a prediction is a statement about the future. It's a guess, sometimes based on facts or evidence, but not always.
