Black Quote by Edsger Dijkstra

Everything is theoretically impossible, until it is done.

— Anonymous

The impossible often has a kind of integrity to it which the merely improbable lacks. How often have you been presented with an apparently…

— Douglas Adams

...operational proof...it's all theory until you see for yourself whether or not something works.

— Julia Child

Do not put forward anything that you cannot prove by experimentation.

— Louis Pasteur

If something's not impossible, there must be a way of doing it,

— Nicholas Winton

Action will remove the doubt that theory cannot solve

— Pehyl Hsieh

You insist that there is something a machine cannot do. If you tell me precisely what it is a machine cannot do, then I…

— John von Neumann

“When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he…

— Arthur C. Clarke

If the experiments which I urge be defective, it cannot be difficult to show the defects; but if valid, then by proving the theory,…

— Isaac Newton

All things are possible until they are proved impossible

— Anonymous

Action will remove the doubts that theory cannot solve.

— Tehyi Hsieh

Experimental evidence is the final arbiter of right and wrong.

— Brian Greene