"Let us swear while we may, for in Heaven it will not be allowed."
You have just completed your thesis, a term paper, a letter to a new client, or a press release, and you've read it and re-read it, but you're just not sure if it's right. You're not certain if you have communicated your ideas in the clearest and most effective way possible.
Writing was developed independently in Egypt, Mesopotamia, China, and among the Maya in Central America. There are some areas where the question as to whether writing was adopted or independently developed is in doubt, as at Easter Island.