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

— William of Ockham Dialogus (1494)

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More quotes by William of Ockham

Plurality is never to be posited without necessity.

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)

Purely philosophical assertions which do not pertain to theology should not be solemnly condemned or forbidden by anyone, because in connection with such [assertions] anyone at all ought to be free to say freely what pleases him.

Dialogus (1494)

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