I was reminded recently of my one year study of philosophy and logic. One prominent argument I love was given by Heraclitus when he stated that "No man ever steps in the same river twice, for it is not the same river and he is not the same man" which is fancy for saying there is constant change or a state of Flux in everything. I cannot say I agree 100% with that assertion. What happens when all around changes but the very essence of the core of a thing remains the same, 'unchanged' . Therefore the circle is the circle is the circle regardless of my alterations through processing.