Read this and answer the question. If the question is unanswerable, say "unanswerable".

Scholars now believe that the Arian Party was not monolithic, but held drastically different theological views that spanned the early Christian theological spectrum. They supported the tenets of Origenist thought and theology, but had little else in common. Moreover, many labelled "Arian" did not consider themselves followers of Arius. In addition, non-Homoousian bishops disagreed with being labeled as followers of Arius, since Arius was merely a presbyter, while they were fully ordained bishops. However, others point to the Council of Nicaea as proof in and of itself that Arianism was a real theological ideology.[citation needed]

What did the Council of Nicaea decide about Arianism?
a real theological ideology