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Ternary logic – Wikipedia, the free encyclopedia
Some ternary logic systems represent truth values numerically. One common scheme uses 0 for unknown, 1 for true, and 2 for false. Other systems may represent truth with 1 and falsity with 0, denoting the third value by # or ½. Balanced ternary, often used in ternary digital circutry, uses -1 for false, 1 for true and 0 for the indeterminate value. Such a scheme may also use the shorthand -, 0, and .