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A System Is Empirical Or Scientific Only If It Is Capable Of Being Tested By Experience. These Considerations Suggest That Not The Verifiability But The Falsifiability Of A System Is To Be Taken As A Criterion Of Demarcation... It Must Be Possible For An Empirical Or Scientific System To Be Refuted By Experience.

The Moral Decisions Of Others Should Be Treated With Respect, As Long As Such Decisions Do Not Conflict With The Principle Of Tolerance.

It Is Impossible To Speak In Such A Way That You Cannot Be Misunderstood.

Philosophy Is A Necessary Activity Because We, All Of Us, Take A Great Number Of Things For Granted, And Many Of These Assumptions Are Of A Philosophical Character; We Act On Them In Private Life, In Politics, In Our Work, And In Every Other Sphere Of Our Lives -- But While Some Of These Assumptions Are No Doubt True, It Is Likely, That More Are False And Some Are Harmful. So The Critical Examination Of Our Presuppositions -- Which Is A Philosophical Activity -- Is Morally As Well As Intellectually Important.

When We Enter A New Situation In Life And Are Confronted By A New Person, We Bring With Us The Prejudices Of The Past And Our Previous Experiences Of People. These Prejudices We Project Upon The New Person. Indeed, Getting To Know A Person Is Largely A Matter Of Withdrawing Projections; Of Dispelling The Smoke Screen Of What We Imagine He Is Like And Replacing It With The Reality Of What He Is Actually Like.