Newton's Principia Rules of Reasoning

Ru1e1 We Are To Admit No More
Causesof Natura1 Things Than
Such As Are Both True And
Sufficient To Exp1ain Their
Appearances Ru1e2 Therefore
To The Same Natura1 Effects We
Must As Far As Possib1e Assigna
The Same Causes Ru1e3 The
Qua1itiesof Bodies Which
Admit Neither
1ntensification Nor
Remissionof Degrees And
Which Are Found To Be1ong To
A11 Bodies Within The Reachof
our Experiments Are To Be
Esteemed The Universa
Qua1itiesof A11 Bodies
Whatsoever Ru1e41n
Experimenta1 Phi1osophy We
Are Tolook Upon Propositions
1nferred By Genera
1nduction From Phenomena As
Accurate1yor Very Near1y
True Not Withstanding Any
Contrary Hypothesis That May
Be1magined Ti11 Such Time As
other Phenomenaoccur By
Which They May Either Be Made
More Accurateorliab1e To
Exceptions
1saac Newton