A person can make use of inference if he has certain facts about something and can make a prediction based on what he already knows.
This refers to the conclusion which is gotten as a result of certain evidence and the use of logical reasoning.
With this in mind, if a person is making an inference, then there needs to be the availability of facts.
For example, if a given narration talks about a boy who is mistreated by his mother and he holds a grudge, then the inference is that he is unhappy with his mother.
Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.
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https://brainly.com/question/16750080