The purpose of human thought is to attain the true knowledge and may be certain.

However, in reality the results of thought and the reasons presented are not necessarily always true.

True according to reality, meaning if the thought is really in accordance with reality. And so is "wrong does not match reality. So it can be concluded that the measure to determine a thought is right or wrong.

Basically, people can understand or know about a thing because of a notice or because someone is doing a contemplation of a thing. The results of his understanding are then triggered in a verdict. The action of a person in reaching a verdict is a series of actions from one person's decision to a new decision that seems to move from one decision to another.

Then the action of man with his body from one decision to another and this is called the way of thinking.