Dualism is an attractive philosophy with an Achilles' heel. Dualists since Descartes have never given a good answer to the problem of interaction. Finally, I think I've got one. I have a working resolution to the problem of interaction that I call a theory of indirect interaction, which allows effective interaction between objects in different ontological categories. Original article here: http://steve-patterson.com/mind-body-dualism-solving-problem-interaction/