I have literally spent all day reading and am still very much in the dark. First off does anyone have a link to detailed blow by blow account that doesn't assume an understanding of advanced maths and physics concepts and notations but will actually address the issue in depth? Here are some specifics which i'm struggling with: 1. How do you 'read' a unitary matrix? 2. Isn't introducing square roots basically introducing an indeterminate? 3. Is there an explanation or theory of why experiments are returning results which favour QM at certain 'angles'? 4. Can someone explain this, specifically amplitudes "So, cancellation between positive and negative amplitudes can be seen as the source of all quantum weirdness - the one thing that makes quantum mechanics different from classical probability theory"?