 However, Schaller did at least acknowledge this issue, saying that languagelessness is the only similarity between Ildefonso and the "wild children," and writing, "Deafness is not wildness, and the isolation of languagelessness alone is not the isolation of the woods or a basement or imprisonment on a chair" (Schaller p. 156).It has also been suggested that the characterization of Ildefonso as entirely "languageless" may be an oversimplification.In the same review, Padden speculates that "Schaller may have been teaching language to Ildefonso, but more accurately, she was teaching him how to map a new set of symbols on a most likely already existent framework of symbolic competence."