Thought-caste

The thought-caste were a caste of Sumrias from the Lol system. They had four digits on each hand, which was the probable reason for the development of base-eight mathematics by the Sumrian people. This base-eight mathematics resulted in the development of the Df scale, a measurement of the effective range of artillery.

Sources

• Imperial Sourcebook (First mentioned)
• Imperial Sourcebook, Second Edition