Doubt Quote by Hilaire Belloc

A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

— Richard P. Feynman

It is not unscientific to make a guess, although many people who are not in science think it is.

— Richard P. Feynman

If you thought that science was certain - well, that is just an error on your part.

— Richard P. Feynman

It must be, for there is a logic to everything on this earth and nothing is done without a reason, that God sometimes lets…

— Jules Verne

Science is uncertain.

— Richard P. Feynman

As long as we do science, some things will always remain unexplained.

— Fritjof Capra

As it turns out, what looks like science sometimes is not.

— Jose Padilha

We are not sufficiently astonished by the fact that any science may be possible.

— Louis de Broglie

I am quite conscious that my speculations run beyond the bounds of true science....It is a mere rag of an hypothesis with as many…

— Charles Darwin

but, in reality, there is no such thing as an exact science.

— William Stanley Jevons

Science can only state what is, not what should be.

— Albert Einstein

Science should always be in the business of attempting to disprove itself.

— Ben Stein