First, The phenomenon always occurs.
Second, There is at least one invariable antecedent.
Third, The other antecedents vary.
Giving attention to the attending symbolized illustrations it may be noted that “P,” the phenomenon, always happens; while in the case of the first symbolization, “D” is the invariable antecedent and “A, B, C, E, G, L, M, F, I” are the variable antecedents. “K” is the invariable antecedent of the second and “H, I, L, T, M, W, X, Y, Z, S” are the variable antecedents.
Antecedents Consequents
1. A B C D E — P₁
A B C D G — P₂
L B C D M — P₃
A F G D M — P₄
L B C D I — P₅