Boolean complement rule: Evaluate the statement: “In Boolean algebra, the complement of 1 is 0.” Support your answer with truth-level reasoning.

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Complements are fundamental in Boolean algebra and digital logic. The complement (logical NOT) flips a truth value: what is true becomes false and vice versa. This concept is directly realized in hardware by inverters.



Given Data / Assumptions:

  • Binary logic levels: 0 and 1 represent false and true, respectively.
  • NOT operation: produces the complement of its input.
  • Positive logic is assumed (1 = TRUE, 0 = FALSE).


Concept / Approach:
By the definition of complement in Boolean algebra, NOT(1) = 0 and NOT(0) = 1. This identity underlies De Morgan’s laws, inverter gates, and expressions using overbars or primes.



Step-by-Step Solution:

Start with input 1 (TRUE).Apply NOT → output becomes 0 (FALSE).Therefore, the complement of 1 is 0.


Verification / Alternative check:
Truth table of an inverter: input 0 → output 1; input 1 → output 0. The mapping is unambiguous.



Why Other Options Are Wrong:

Incorrect: Contradicts Boolean definition.Only true in active-LOW systems: Active-LOW changes naming conventions, not the algebraic NOT operation.Not enough information: The rule is universal in Boolean algebra.


Common Pitfalls:
Confusing logic polarity (active-HIGH/LOW) with the meaning of NOT; assuming electrical inversion always implies voltage inversion rather than logic inversion.


Final Answer:
Correct

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