No more things should be presumed to exist than are absolutely necessary.

First it must be known that only a spoken word or a conventional sign is an equivocal or univocal term; therefore a mental contentor concept is, strictly speaking, neither equivocal nor univocal.

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

Entities are not to be multiplied beyond necessity.

Pluralitas non est ponenda sine necessitate. A plurality (of reasons) should not be posited without necessity.

Plurality is not to be posited without necessity.

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