In particular, a discussion about the disciplinarity of Machine Learning struck a chord with me. To address the disciplinarity issue, my colleague started by showing a diagram of other disciplines he thought related to his field. My version, for GIS, would start with this:
but of course there are many more areas that could be included. A discipline can be defined as "http://oxforddictionaries.com/), so certainly GIS is a discipline in that sense, but it would be interesting to find out which other disciplines people feel contribute to GIS?
(Thanks to my fellow students for the concepts)