Granville's(not so sharp,) rule and trinitarian's lack of self awareness.

 In an attempt to prove the trinity doctrine, Granville Sharp made up a rule in 1798. It is often called “Sharp’s Rule” by trinitarians. It says, in effect, that when two or more words (nouns) are joined by the word “and” they all refer to the same PERSON if the word “the” (the article) comes before the first noun and not before the other noun(s): “THE king AND _master of the castle.” 

That trinitarians ,even presently , imagine that this "rule", even if we grant that it is not suspect, could possibly be of any use as evidence of their doctrine says volumes about their total lack of self awareness. All of the creeds go to great lengths to state that no person of the trinity is numerically identical to any other person of the trinity. Thus at best ,Sharp's "rule" can be used to make a weak case for modalism which is denounced as the blackest heresy by Trinitarians.