Page "Mishneh Torah" Paragraph 6

Later sources include the responsa ( teshuvot ) of the Geonim.

The maxims and decisions of the Geonim are frequently presented with the introductory phrase " The Geonim have decided " or " There is a regulation of the Geonim ", while the opinions of Isaac Alfasi and Alfasi's pupil Joseph ibn Migash are prefaced by the words " my teachers have decided " ( although there is no direct source confirming ibn Migash as Maimonides ' teacher ).

According to Maimonides, the Geonim were considered " unintelligible in our days, and there are but few who are able to comprehend them.

" There were even times when Maimonides disagreed with what was being taught in the name of the Geonim.