Site policy: posts will be amended or revised up until that point where a reply comment is posted. This may seem strange, to allow an essay to be edited after submission. Inspiration is drawn from Pirsig’s statement that “the pencil is mightier than the pen”. Ideas evolve to the point that there’s some acceptance, at which point the understanding is latched and becomes static. My bio is available from www.linkedin.com/in/geoffkirwood and if there’s anything further to find out, ring me on 0438 684318 (replace 0 with 61 if o/seas).