Modus ponens
Probability calculus

If Pr (P → Q) = x {\displaystyle \Pr(P\rightarrow Q)=x} and Pr (P) = y {\displaystyle \Pr(P)=y}, then Pr (Q) {\displaystyle \Pr(Q)} must lie in the interval {\displaystyle }. For the special case x = y = 1 {\displaystyle x=y=1}, Pr (Q) {\displaystyle \Pr(Q)} must equal 1 {\displaystyle 1}.
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