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

Simpler explanations are, other things being equal, generally better than more complex ones.

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

Entities should not be posited unnecessarily.

Plurality is not to be posited without necessity.

Entities are not to be multiplied beyond necessity.

Entia non sunt multiplicanda praeter necessitatem