 Another recent counternarrative sees ancient mainstream Christian theology as changing from unitarian to trinitarian. Tuggy (2019) argues that in the New Testament the one God is not the Trinity but rather the Father alone. The argument moves from facts about the texts of the New Testament to what the authors probably thought about the one God, using what philosophers of science call the likelihood principle or the prime principle of confirmation. Tuggy sees such identification of the one God with the Father dominating early Christian theologies until around the time of the second ecumenical council in 381 C.E. (Tuggy 2017, Chapter 5). Then, the Son and the Spirit, which in many 2nd to early 4th c. speculations were two lesser deities in addition to God, were taught to, together with the Father, somehow comprise the one God, the Trinity. (2016b, Sections 2–3)