Spend Matters recently used an expression “drinking the Kool-Aid” when referring to the unquestioning beliefs of software vendors’ marketing people. I didn’t even know what Kool-Aid was but I knew what he meant. It’s what I call believing your own bullshit and we see so much of this whenever the topic of e-invoicing and interoperability crops up. Despite the fiercely opposed arguments, there is something very consistent about the views expressed on interoperability. They are all very biased. I’m not 100% objective myself – I have my own personal likes and dislikes based on over 15 years’ experience in this market and I don’t pretend to be the most informed but nevertheless, I will attempt to filter out the crap that reverberates around this debate and share my point of view on e-invoicing and interoperability.