• The Laws of Logic Hold Universally
• Christianity's distinctive, characteristic beliefs

This has been flagged as an appeal to authority. Before removing this flag, ensure the reasoning is based on the evidence the authority had, not the authority itself.

• the ecumenical councils held that the son is not the Spirit
• The positions of the ecumenical councils have stood up to scrutiny for 2,000 years
• If the positions have stood up to scrutiny for 2,000 years, they are true
• If the above is true, x the Son is the Spirit

∴ x the Son is the Spirit

Niceno-Constantinopolitan Creed

the Son is the Spirit