I have given more thought to the basic outline of the error message, two variations:
R0.1A: This can be a subtle error; when “\2” is used to begin a sentence there is an implication of a 2nd clause; however, the rule can find no punctuation or coordinating conjunction. The exact cause may be poor style, but is more likely to be a hard grammatical error, such as: A missing comma, question or exclamation mark. Another possibility is splitting a sentence with closely linked clauses; for example, using a full stop instead a colon. Also, the error can be caused by poor phrasing, or excessive and unclear wordage. Confusing closely related words may also be a cause of this error, e.g using 'that' instead of 'this'. R0.1B: This can be a subtle error; when “\2 \3” is used to begin a sentence there is an implication of a 2nd clause; however, the rule can find no punctuation or coordinating conjunction. The exact cause may be poor style, but is more likely to be a hard grammatical error, such as: A missing comma, question or exclamation mark. Another possibility is splitting a sentence with closely linked clauses; for example, using a full stop instead a colon. Also, the error can be caused by poor phrasing, or excessive and unclear wordage.I would be grateful for your comments before I submit a revised set of rules.
Irvine