Treatise
A treatise was a systematic written text on any subject, generally longer than an essay.

Prior to 2152, Vulcan diplomat V'Lar had written a treatise on negotiating tactics, which T'Pol considered the definitive text about this subject. ()

Prior to playing poker, Data had read and internalized every treatise and textbook on games of chance, but upon his first real poker game, he realized that despite feeling well prepared through all this information, an actual game was very different. ()

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Literature genres