Area PFt is the parietal hub for goal-directed complex tool use, whether physical or digital

The tenuicortical supramarginal gyrus, i.e., area PFt, as a node controlling tool use, multisensory integration, or even some aspects of language, can be considered a hub for causal/technical reasoning and, putatively, the control of technological artifacts. By analogy to its involvement in motor-to-mechanical goal-directed physical transformations associated with complex tool use, we suggest that it should also be invoked in more complex mental-to-digital goal-directed conceptual transformations supported by digital devices. Conversely, a simple 'outsourcing' of mental functions to a handy digital tool - by clicking or touch-selecting for a desired outcome - will not suffice to its engagement.