Task
source(s) of truth:
The source(s) of truth contain(s) more information than you need. You should only take what you need for the user-requested task. Your sources-of-truth have their own writing styles. Take their content, but not their writing style, which may actually be bad.
In the context of Help:Contributing, this means common usages that editors will use on a daily basis. The source(s) of truth can be included in the end in a == See also == section as links if appropriate.