about the author, My name is Gregory Podgorniak (brn. 01.1977, Szczecinek, West Pomerania, Poland). I am working on field of natural as well as social sciences. During philosophical studies at Adam Mickiewicz University in Poznan (1996-1999) I was actively act in student scientific organisation, got a scientific scholarship, and one from my articles titled Circulus vitiosus and fourfold petitio principii in the system of Descartes was published in Humanistic Drafts of Publishing House of Humanio