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Entities should not be multiplied beyond necessity.

— William of Ockham Misattributed

Entia non sunt multiplicanda praeter necessitatem.

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More quotes by William of Ockham

Plurality is never to be posited without necessity.

It is on account of theology alone that any assertion whatsoever should be called catholic or heretical.

Dialogus (1494)

Plurality ought never be posited without necessity.

It is pointless to do with more what can be done with fewer.

Logic is the most useful tool of all the arts. Without it no science can be fully known.

Summa Logicae (1323)

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Attribution

Quote text and notes from Wikiquote: William of Ockham (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.