Colin, hi
1. I have checked your take on Plato-yes, it seems about right to me you are accurate
2. The slides: of course you can use them-that is the reason they are out there-for anyone to use them-take some ownership and if you like build on them-return the presentation back here eh-that would be a lovely way to construct what we know-what we think-what we might re-consider...glad you can find a use for them-my pleasure!
warm wishes
Dawn