Can not Quote by Mahmoud Ahmadinejad

science progresses by trial and error, and when it is forbidden to admit error there can be no progress.

— Joan Robinson

There cannot be any impediment to science that will ultimately be good to the general public.

— Anonymous

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

— Georg C. Lichtenberg

Science, by itself cannot, supply us with an ethic.

— Bertrand Russell

There is something in man which your science cannot satisfy.

— Thomas Carlyle

And what is impossible to science?

— Friedrich Engels

A scientist who cannot prove what he has accomplished, has accomplished nothing.

— Walter Reisch

Only a scientific people can survive in a scientific future.

— Thomas Huxley

By denying scientific principles, one may maintain any paradox.

— Galileo Galilei

Progress is impossible without the ability to admit mistakes.

— Masaaki Imai

Though many have tried, no one has ever yet explained away the decisive fact that science, which can do so much, cannot decide what…

— Joseph Wood Krutch

Science does not permit exceptions.

— Claude Bernard