Can it be determined from scripture, how many "persons" constitute "God?"
Matthew 22:31 But as touching the resurrection of the dead, have ye not read that which was spoken unto you by God, saying,32 I am the God of Abraham, and the God of Isaac, and the God of Jacob? God is not the God of the dead, but of the living.
"egw eimi o` Theos"
Mark 12:26 And as touching the dead, that they rise: have ye not read in the book of Moses, how in the bush God spake unto him, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob? 27 He is not the God of the dead, but the God of the living: ye therefore do greatly err.
Luke 1:19 And the angel answering said unto him, I am Gabriel, that stand in the presence of (Theou) God; [The Greek word for "GOD" is "Theou"= noun gen masc SINGULAR. Only ONE 'person' in a singular being.
Exodus 3:13 And Moses said unto God, Behold, when I come unto the children of Israel, and shall say unto them, The God of your fathers hath sent me unto you; and they shall say to me, What is his name? what shall I say unto them?
LXE Exodus 3:14 And God spoke to Moses, saying, (GRK.(egw eimi o` wn) I am THE BEING; and he said, Thus shall ye say to the children of Israel, THE BEING has sent me to you.
egw = Singular nominative personal pronoun= "I"
eimi = Singular present active indicative 1st person singular verb = "AM"
o` = Singular nominative masculine definite article = "THE"
wn = Singular present active nominative masculine verb participle = "BEING"
So GOD told MOSES "I AM THE BEING" using singular grammar to declare his singularity of persons.
He used this grammar (Singular) over 100 times in the Law, in the prophets, and in the Psalms, as well as into the New Testament, to demonstrate His "single-person" Being.
Furthermore, Jesus' own testimony demonstrated for all time, the He is "God's Christ" and NOT GOD.
Look at the grammar of the language Jesus used to demonstrate fpr all time, His humanity;
John 4:24 God is a Spirit: and they that worship him must worship him in spirit and in truth.
Luke 24:39 Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.
And again, he said - John 7:17 "If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself;" Thus differentiating between Himself and God.
Luke 9:20 He said unto them, But whom say ye that I am? Peter answering said, The Christ of God.