Reasoning
Reasoning is using the facts in front of you to make decisions.
Reasoning has its roots in the here-and-now, and in facts. It can ignore emotional aspects to the decision, and issues from the past that may affect the way that the decision is implemented.
Intuition is a perfectly acceptable means of deciding, although it is generally more appropriate when the decision is of a simple nature or needs to be made quickly.
More complicated decisions tend to require a more formal, structured approach, usually involving both intuition and reasoning. It is important to be wary of impulsive reactions to a situation.