A thought occurred, as they often do, whilst I was singing whilst taking a shower. "Is freewill , in the main an act of improvisation?" I thought as I sung total gibberish to the sound of cascading water. Do we take every moment and improvise in that moment? Is life a continuous state of Ad LIb,,,,( musical term). When I listen to a Jaz, Blues singer and their improvisation over a structure, whether it be a Bass and percusion structure, I see certain parallels to life in general. Determinable structure of our lives which we improvise "over the top" with. It has often been the subject of much poetry and philosophy that every one lives to their own tune and their own rhythm. Is this just showing us that we are constantly improvising on the structure provided.?