The meaning of reason is to question, to call to account, to hold argument, discussion, discourse, talk or converse with another to employ reasoning or argument with a person in order to influence conduct or opinions; to think in a connected, sensible or logical manner; to employ the faculty of reason in forming conclusions.; to explain, support, infer, deal with by reasoning; to think out, to arrange the thought of in a logical manner.

Three categories of reason have been distinguished as evidencing, motivating and causally necessitating. In the context of evidencing, a reason for believing X is an item of evidence showing or tending to show that X is true. Read more