Theory Not Only Formulates What We Know

If Observed Facts Of Undoubted Accuracy Will Not Fit Any Of The Alternatives It Leaves Open, The System Itself Is In Need Of Reconstruction.

The Implications Of These Considerations Justify The Statement That All Empirically Verifiable Knowledge Even The Commonsense Knowledge Of Everyday Life - Involves Implicitly, If Not Explicitly, Systematic Theory In This Sense.

Special Emphasis Should Be Laid On This Intimate Interrelation Of General Statements About Empirical Fact With The Logical Elements And Structure Of Theoretical Systems.

If There Are Four Equations And Only Three Variables, And No One Of The Equations Is Derivable From The Others By Algebraic Manipulation Then There Is Another Variable Missing.

The Functions Of The Family In A Highly Differentiated Society Are Not To Be Interpreted As Functions Directly On Behalf Of The Society, But On Behalf Of Personality.