Syntax Elementary proposition (constructed by assignment of a value to a random variable: e.g.,Weather sunny,Cavity false (abbreviated as-cavity) Complex propositions formed from elementary propositions and standard logical connectives. e.g.,Weather sunny V Cavity false 4口◆4⊙t1三1=，￥9QC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Syntax Elementary proposition（命题） constructed by assignment of a value to a random variable: e.g., Weather = sunny, Cavity = false (abbreviated as ¬ cavity) Complex propositions formed from elementary propositions and standard logical connectives. e.g., Weather = sunny ∨ Cavity = false