Dienes & Perner's analysis provides a clear theoretical justification for using a demonstration of volitional control as a criterion for conscious awareness. However, in memory tasks, the converse does not hold: A phenomenological awareness of a memory episode can arise involuntarily, even when the task does not require retrieval of the episode. The varying amounts of volitional retrieval required by different memory tasks need to be recognized.

We agree with Frost that the variety of orthographies in the world's languages complicates the task of Frost suggests that orthographic processing must therefore differ between orthographies. We suggest that the same basic orthographic processes are applied to all languages. Where languages differ is in what the reader must do with the results of orthographic processing.