It is difficult to say whether dyslexia existed prior to written language, as the condition is associated with difficulties in reading and writing. It is possible that some symptoms of dyslexia may have been present in individuals without any noticeable differences in their daily lives. For example, individuals may have had difficulty with spatial orientation, memory, and problem-solving. They may have also had difficulty understanding speech and processing verbal instructions. Additionally, they may have had difficulty with organization and planning. However, without the written language, it would have been difficult to diagnose and identify dyslexia in individuals in this period.