There is some crossover among different groups within Vorinism, such as with Essential Theology, which is known to be used by ardents, scholars, and Soulcasters, and is related to polestones.{{book ref|sa3|109}}
{{anchor|Causal}}
All official Vorin betrothals must be signed and verified by ardents. As a result, people sometimes use a '''causal''' betrothal, which makes them practically engaged but confers no legal benefits.{{book ref|sa2|1}}