The Hinton reference you were trying to find was likely joint work with Timothy Lillicrap. Geoff refers to it, among other places, in the (recorded) lecure from

The Hinton reference you were trying to find was likely joint work with Timothy Lillicrap. Geoff refers to it, among other places, in the (recorded) lecure from the reminescence symposium for David MacKay. http://divf.eng.cam.ac.uk/djcms2016/#hinton http://divf.eng.cam.ac.uk/djcms2016/#hinton I don't know that there is an article out for that work yet, but the initial finding by Lilllicrap et al. has been published as a preprint: https://arxiv.org/abs/1411.0247 https://arxiv.org/abs/1411.0247