Intuition is the way contemplation can lead to knowledge of self-evidence. We often use the word “intuition” to refer to things we consider “common sense” or things we know that are difficult to prove using argumentation. Ross thinks we can know things without arguing for them, and he thinks that anything “truly intuitive” is self-evident. Keep in mind that intuition doesn’t necessarily let us know that something is self-evident immediately nor that intuitive contemplation is infallible. Consider that “123+321=444” could be self-evident. We might need to reach a certain maturity to know that this mathematical statement is true, and recognition of its truth is not necessarily immediate. It requires familiarity with addition and some people will need to spend more time contemplating than others.