The book consists in three parts of which Part One and Part Two form an integral whole combining principle of communication with principles of reason. The third part was included because philosophy of science was one third part of the official requirement for students going up for the Examen Philosophicum (which was obligatory for all students seeking a degree from Norwwegian universities). Therefore it is reasonable to consider Part Three as independent of the first two parts. I therefore give permission for any users of this text - whether commercial or not - to publish or print Part One and Two as a separate work if required. Likewise, Part Three on the philosophy of science may be published seperately from the first two parts.

I hereby permit the use of the work according to the Creativre Commons license, with the above clearing right.

Robert C. Priddy

For inquiries about further information or permissions, please contact me by mail at the following address

Robert C. Priddy

Agathe Grøndahlsgate 2B

Oslo 0478

Norway.