Henri Poincaré on facts

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.

Scientists believe there is a hierarchy of facts and that among them may be made a judicious choice. They are right, since otherwise there would be no science…

The Scientist must set in order. Science is built up with facts, as a house is with stones. But a collection of facts is no more a science than a heap of stones is a house.

Everyone is entitled to his own opinion, but not his own facts.

Daniel Patrick Moynihan1927–2003Often credited to Unattributed

The main part of intellectual education is not the acquisition of facts but learning how to make facts live.

Oliver Wendell Holmes Jr.1841–1935

• Education

If the facts don’t fit the theory, change the facts.