Learn in the textbookSets and Logical Operations
DefinitionA truth table (真理値表) lists every combination the inputs can take, one per row, together with each output.
ExplanationTrue is usually written as 1 and false as 0, and with n inputs the table has 2 to the power n rows. Because the table spells out an operation's behavior completely, two expressions that produce the same table behave the same way.
AnalogyFor a light with two switches, a list made by trying every on/off pattern and noting whether the bulb lights.
Memory hookA "truth value" is the value true or false, and the table is named for listing those values.