If Observed Facts Of Undoubted Accuracy Will

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.

A Scientifically Unimportant Discovery Is One Which, However True And However Interesting For Other Reasons, Has No Consequences For A System Of Theory With Which Scientists In That Field Are Concerned.

Empirical Interest Will Be In The Facts So Far As They Are Relevant To The Solution Of These Problems.

Theory Not Only Formulates What We Know But Also Tells Us What We Want To Know, That Is, The Questions To Which An Answer Is Needed.

The Hypothesis May Be Put Forward, To Be Tested By The S Subsequent Investigation, That This Development Has Been In Large Part A Matter Of The Reciprocal Interaction Of New Factual Insights And Knowledge On The One Hand With Changes In The Theoretical System On The Other.