67. Does not the Bible speak of Father, Son, and Holy Ghost?

Yes, as in Matthew 28:19. These are TITLES (i.e. different offices of the ONE God). Note that reference even in this context is pointing to the NAME which is singular and should be identified to carry out the command.

Matthew 28:19
19. Go ye therefore, and teach all nations, baptizing hem in the NAME of the Father, and of the Son, and of the Holy Ghost:

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