Consider the actual meaning of "IDENTITY".
For something or someone to EXIST it can and must be only what it is. This is a contrast. What it ISN'T is now clearer.
If there were only one living person in all the universe there would arise no need whatsoever for that being to possess the distinguishing characteristic of a NAME.
A Name distinguishes one from another. Existence would BE identity.
A Being who could be anything would not be itself. Self distinguishes FROM all other.
If that is clear in your mind...continue...
If there were only two such beings, should we suppose they'd give each other names so that they are not confused as to who is whom?
Silly enough question. Something would IDENTIFY one from the other. But, what?
Being of the same substance or "stuff" as your Parent (Supreme Being) you'd only differ by your ranking (when you were created, i.e. 1st, 2nd, 3rd, so on in the case of other siblings.)
To EXIST is to BE something. Not OTHER.
For a thing to exist apart from its identifying characteristics is a logical contradiction!
A square Triangle, for example. It means nothing. The sound of one hand clapping....means nothing. It disinhibits the rational functionality of mind.
To introduce existing thingsAPART from their identity is the first step toward destroying your thinking and concept forming aspect of intelligence!
To identify the first Son of God (when others also exist) requires an order in the flow of time. (1st,2nd,3rd)
Were the Trinity doctrine correct, an IDENTITY would not remain possible. Why? God would BE and NOT BE characteristics of specific identity simultaneously.
Example:
For a Parent to (pro)create a son requires that the parent actually exist prior to that son. Were they co-existent one could not "parent" the other.
Instead of IDENTIFYING the son by distinguishing one from the other--the identity FAILS utterly. Like a square Triangle it means nothing.
For Jesus to be the "First" born of all creation would IDENTIFY him characteristically and distinguish him for what he IS and what he IS NOT.
Is Jesus an IDENTITY? If "yes" he cannot be his own parent. Why? Because the Parent would then BE the child and both the term "Parent" and the term "child" would be destroyed as logical meanings.
What about (finally) MICHAEL?
If MICHAEL has identity as an ARCHangel (head of) angels what are the characteristics of that identity?
Would it be necessary to ALSO BE an Angel himself, or, merely HEAD OF them?
I could be a Cub Scout leader without being a boy who is a Cub Scout, could I not?
But, for Jesus to BE Michael...logically...Michael could never be DIFFERENT in any way FROM Jesus.
Otherwise, we have our square triangle again.
Either words have meaning or they do not. Words can only mean what they mean (identifying)...or else..by meaning "other" they cease to function.