The cerebellum is not, afaik, relevant to intelligence in any way shape or form. There are case studies of people with more or less complete agenesia (=lack) of

The cerebellum is not, afaik, relevant to intelligence in any way shape or form. There are case studies of people with more or less complete agenesia (=lack) of the cerebellum who didn't know about it until they went into an MRI for unrelated reasons. Iirc they mostly had below average motor skills but that's it.