Geometry of finite boolean algebras and their states.- De Finetti's "Fundamental Theorem of Probability".- De Finetti's Consistency Theorem.- Boolean independence, consistency, and the product law.- Interlude: de Finetti's exchangeability theorem.- The logic L8 of continuous [0, 1] valued events.- MV algebraic probabilistic consistency.- The product law for continuous [0, 1] events.- Finite/countable additivity.