The existence of the graviton is repeatedly questioned and surrounded with deep doubts. This affirmation is supported by several elements: The demonstration itself; one get the presumption of that existence via a simplification of the équations of the (generalized) theory of relativity (A. Einstein). Numerous experimental unsuccessful attempts devoted to the detection of flows of gravitational waves proving the existence of quanta of gravitation; and the reader may find very interesting documents here on the PF explaining why it is difficult to discover these quanta. Repetitive questions and answers formulated on PF. My two questions: 1°) “To the repetitive question: “Why can we not detect gravitons?” can we propose the following answer: “They don’t exist!”?” 2°) In the same vein: “What do you think about the actual research which could be called “the octonionic path” proposing a link between quarks, gluons and gravity at Planck scale?” For my self-defense I must say that I am not a professional teacher in physics but just an amateur with a passion for physics. My own approach is pushing me into the direction evocated in my second question and I am happy to state that my intuition seems to be in harmony with some professional essays. Following the rule here, I may propose the references (ignoring if it has been published and confirmed): F. D. (Tony) Smith Jr.: Calculation of 130 GeV mass for t-quark: arXiv: hep-ph/9301210v3 15 January 1993. C. White: New insights into soft gluons and gravitons, ICHEP 2012; University of Glasgow. R.S. Isermann: Of gluons and gravitons: exploring color-kinematics duality (Doctor Thesis, Germany 2013).