Abstract
Although it is widely assumed that gravitation is attraction only, the existence of gravitational repulsion cannot be excluded. In a recent study, for the first time non-classical physical principles underlying an assumed matter-antimatter gravitational repulsion have been positively identified. This dialectic essay focusses on the all-determining first cycle of thesis, antithesis and synthesis of that study, and explains why these principles - together called: the Elementary Process Theory (EPT) - are outside the framework of contemporary physical theories. A Cartesian analysis of the assumption on gravitational repulsion yields the unquestionable thesis that antimatter then must have positive rest mass and negative gravitational mass. The antithesis to this thesis is then that this combination of properties is impossible from the perspective of established theories. The synthesis is then that this combination of properties has to be underlied by a fundamentally new physical principle, which is that rest-mass-having particles alternate between a particlelike state and a wavelike state. The final section addresses the question of correctness and completeness of the EPT.
Marcoen J.T.F. Cabbolet