Assertion: writer's writing | /r/HasProperty | independent invention
Facets:
Source sentences:
text: 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.
text: It is generally agreed that the historically earlier 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.