No data is preferable to poor data.

No religious position is loyally served by refusing to consider annoying theories which may well turn out to be facts.

I don't have a preference between manufacturing, sales, or preparations.

Old things do not interest me, I like new things for the simple reason that they never get old.

Out-of-date theories are not in principle unscientific because they have been discarded. That choice, however, makes it difficult to see scientific development as a process of accretion.

There is no case where ignorance should be preferred to knowledge — especially if the knowledge is terrible.

If no set of moral ideas were truer or better than any other, there would be no sense in preferring civilised morality to savage morality.

The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.

No theory adequately covers reality.

هیچ چیز بیشتر از آوردن دلیل برای توجیه بی فکری به کوشش فکری نیاز ندارد.

I have all the world to choose from, but no reason whatever for a choice.

There is no means of proving it is preferable to be than not to be.

Today this kind of analysis is entirely obsolete, but at the time it was taken as self-evident by many activists. This kind of ideology does not respect alternative views or allow an open society.

I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypotheses; for whatever is not deduced from the phenomena is to be called a hypothesis, and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.