The metastimuli system architecture. An atom a of stimulus, experienced directly by the user, is, in textual form, also directed through an embedder block that embeds the atom as a vector x, which is the input to an artificial neural network (ANN) pre-trained on the user’s structured personal information management system (PIMS). The output of the ANN yˆ is a low-dimension real vector representing the structural “location” of the atom a, which is converted by an actuator into a metastimulus (e.g. haptic stimulus).