Thanks dhw, if you listen to the introductory talk with accompanying ppt on my site, I believe this will address your question about what 'transactions' are. Also this is explained in my CUP book and also will be explained at a more basic level without math in the popular book I'm writing now (hopefully available in 2014).-Here are the links for the talk and ppt:-http://rekastner.files.wordpress.com/2012/12/introduction-to-tiqm-7-19-12.mp3-https://rekastner.files.wordpress.com/2011/12/the-transactional-interpretation.ppt