"∨" means or, which is equivalent to the union of sets. The truth value of the proposition P∨Q is also related to the truth values of P and Q. When both P and Q are false propositions, the proposition P∨Q is false and the rest are true propositions.

"∧" means ∧, which is equivalent to the intersection of sets. The true value of the proposition P∧Q is related to the true values of P and Q. When both P and Q are true propositions, the proposition P∧Q is true and others are false propositions.

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Mathematical symbol "?" , "∧" and "∨" are logical operations.

Logical operations include union, intersection and subtraction. This logic operation method is used in graphics processing operation, which makes the simple basic graphics combination produce new shapes, and develops from two-dimensional logic operation to three-dimensional logic operation.

Because of Boolean's special contribution to symbolic logic operation, many computer languages call logic operation Boolean operation and its result Boolean value.