A thought is a representation of something. A representation is a likeness a thing that depicts another thing by having characteristics that correspond to that other thing. For example, a picture, image, imprint, or mold of an object is a representation of that object. Thought is an idea or opinion produced by thinking, or occurring suddenly in the mind.

Rationality is the quality or state of being rational, a state based on our agreeability to reason. Rationality implies the conformity of one's beliefs with one's reasons to believe, but really what we called rationality is our ability to recognition patterns, an unconscious state where the brain identifies patterns that it can use to predict and expect what is coming.