Truth Tables

Create truth tables for each. As you go, note any expressions that are equivalent!

  1. A && !A
  2. A || !A
  3. A && B
  4. A || B
  5. !A && B
  6. A && !B
  7. !(A && B)
  8. !A || !B
  9. !(A || B)
  10. !A && !B
  11. A || (A && B)
  12. A && A
  13. A || A
  14. !!A
  15. A && (B || C)
  16. (A && B) || (A && C)
  17. A || (B && C)
  18. (A || B) && (A || C)
  19. !(A && B && C)
  20. !A || !B || !C

Boolean Expressions

Can you find the original boolean expression that results in each of the truth tables below?

Two-Variable Expressions

::: {.columns} :::: {.column width=”48%”}

Example 1:

A B Result
F F T
F T T
T F T
T T F

Example 2:

A B Result
F F F
F T T
T F T
T T F

Example 3:

A B Result
F F T
F T F
T F F
T T F

::::

:::: {.column width=”48%”}

Example 4:

A B Result
F F T
F T T
T F F
T T T

Example 5:

A B Result
F F T
F T F
T F T
T T T

Example 6:

A B Result
F F F
F T T
T F F
T T T

:::: :::

Three-Variable Expressions

Example 7:

A B C Result
F F F F
F F T T
F T F T
F T T T
T F F T
T F T T
T T F T
T T T T

Example 8:

A B C Result
F F F F
F F T F
F T F F
F T T T
T F F F
T F T T
T T F T
T T T T

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