Intuitive cognition of a thing is cognition that enables us to know whether the thing exists or does not exist, in such a way that, if the thing exists, then the intellect immediately judges that it exists and evidently knows that it exists, unless the judgment happens to be impeded through the imperfection of this cognition.

Entities are not to be multiplied beyond necessity.

When you have two competing theories that make exactly the same predictions, the simpler one is the better.

Of two equivalent theories or explanations, all other things being equal, the simpler one is to be preferred.

What can be explained by the assumption of fewer things is vainly explained by the assumption of more things.

Never increase, beyond what is necessary, the number of entities required to explain anything.

Plurality should not be assumed without necessity.