Aphantasia, a cognitive norm variant characterized by the reduced or absent ability to form visual mental imagery, has been a recent topic of interest in philosophy, psychology, and neuroscience. A thus far little discussed finding is that the affected often report having been unaware of their own imagery inability for decades of their life, a phenomenon which is here referred to as aphantasia nescience (the lack of knowledge about one’s own aphantasia). This paper presents a possible solution for the puzzle of how aphantasics (people with aphantasia) can remain in a state of aphantasia nescience. It is argued that aphantasic children learn how to play the language game of visualization, that is, to use the term visualization (and related terms) in socially desirable ways, leading both them and their visualizing peers to remain unaware of the aphantasics’ deviant phenomenology. It is suggested that the presented analysis can function as a template for exploring other cases (e.g., anendophasia) where deviant phenomenology remains undiscovered due to the behavioral abilities of the affected.