It is generally agreed that Sumerian writing was an independent invention; however, it is debated whether Egyptian writing was developed completely independently of Sumerian, or was a case of cultural diffusion.
Secara umum disetujui bahwa tulisan Sumeria adalah suatu penemuan independen; namun, diperdebatkan apakah tulisan orang Mesir dikembangkan penuh secara independen oleh orang Sumeria, atau karena difusi kultural.