An inference is an idea that the speakers or writers do not state openly, but intend you to understand anyway. By their words, they imply (suggest) something. From their words ,you infer something (or draw a conclusion). The traditional difference between “to imply” and “to infer” is that “imply” refer to what a statement means, usually to a meaning not specifically stated but included in the original statement, whereas “infer” is used for a listener’s or reader’s judgement or inference based on the statement. Sometimes the inference is obvious. In fact, the act of speaking or writing seldom avoids inference completely. Very seldom are we presented with surface facts only. Almost automatically, we look behind, under or ahead of the simple facts.