Wikipedia
An immediate inference is an inference which can be made from only one statement or proposition. For instance, from the statement "All toads are green." we can make the immediate inference that "No toads are not green." There are a number of immediate inferences which can validly be made using logical operations, the result of which is a logically equivalent statement form to the given statement. There are also invalid immediate inferences which are syllogistic fallacies.
Usage examples of "immediate inference".
Brotherly love would follow logically from the assurance of God's friendly presence, the notion of our brotherhood as men being an immediate inference from that of God's fatherhood of us all.
She felt a secret stir of pleasure at the immediate inference that she and Darrow would probably lunch alone.
The immediate inference was that Owen had guessed the reason of Darrow's disapproval of his marriage, or that, at least, he suspected Sophy Viner of knowing and dreading it.