 If the terms “Father” and “Son” are temporally non–rigid, or at least like such a term in that each applies to God relative to some one portion of his life but not relative to the others, then the argument is unsound. Relative to the Father-strand of God’s life, 1 will be true but 2 will be false. Relative to the Son-strand, 2 will be true, but 1 will be false. 3 and 5 will be true relative to any strand, but in any case, we will not be able to establish either 4 or 6.