Ancient Egyptian scripts used to write Egyptian, an Afro-Asiatic language spoken in Egypt until about the 10th century AD. After that it continued to be used as a the liturgical language of Egyptian Christians, the Copts, in the form of Coptic. These glyphs alone could be used to write Ancient Egyptian and represent the first alphabet ever divised. In practice, they were rarely used in the fashion. (...)
I love what Steve Covey says about this in The 7 Habits of Highly Effective People. Covey states: "If you know the failure paths of the job identify them. Be honest and open - tell a person where the quicksand is and where the wild animals are. You don't want them to have to reinvent the wheel every day. Let people learn from your mistakes or the mistakes with others. Point out the potential failure paths what #not to do but don't tell them what #to do."