We Must Plan For Freedom, And Not

The Only Way To Test A Hypothesis Is To Look For All The Information That Disagrees With It.

A Theory That Explains Everything, Explains Nothing

We Have The Right Not To Tolerate The Intolerant. We Should Tolerate Even Them Whenever We Can Do So Without Running A Great Risk; But The Risk May Become So Great That We Cannot Allow Ourselves The Luxury.

Reason Like Science, Grows By Way Of Mutual Criticism; The Only Possible Way Of Planning Its Growth Is To Develop Those Institutions That Safeguard. The Freedom Of Thought

Science Does Not Rest Upon Solid Bedrock. The Bold Structure Of Its Theories Rises, As It Were, Above A Swamp. It Is Like A Building Erected On Piles. The Piles Are Driven Down From Above Into The Swamp, But Not Down To Any Natural Or 'given' Base; And If We Stop Driving The Piles Deeper, It Is Not Because We Have Reached Firm Ground. We Simply Stop When We Are Satisfied That The Piles Are Firm Enough To Carry The Structure, At Least For The Time Being.