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

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

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

Whenever two hypotheses cover the facts, use the simpler of the two.

The explanation requiring the fewest assumptions is most likely to be correct.

My God is the green tide in the spring leaves the redness of cherries high in the air the excitement of shooting stars the song of birds in summer branches the sunrise on a winter's morning the name of everything we don't understand.

With all things being equal, the simplest explanation tends to be the right one.