 Unlike the two first figures, whose letters refer to the terms of the first and second signification given in the alphabet, in the Third and Fourth Figures the letters can be substituted by any of the six meanings presented in the alphabet. For example, the combination BC can mean “goodness is great”—the terms are taken from the first meaning of the alphabet—but it can also mean “difference is great”, when the first term is taken from the second meaning, and the second term is taken from the first meaning. Likewise, its sense can be “goodness is concordant”, when the first term is taken from the first meaning, and the second term is taken from the second meaning. Some authors use capital letters when the first sense is used and lowercase letters when the second sense is used to facilitate the understanding and use of the Art. Thus, the given examples could be expressed as BC, bC, Bc.