Logic and Tautology Worksheet LC 1 To 6 Part 2

De Morgan’s laws are used to:

• Add numbers

• Simplify logic expressions

• Multiply numbers

• Divide numbers

A statement that is always true is called:

• Contradiction

• Tautology

• Proposition

• Negation

p ∨ ~p is always:

• False

• True

• Sometimes True

• None

A tautology has truth value:

• Always False

• Always True

• Sometimes True

• None

Which of the following is a tautology?

• p ∧ ~p

• p ∨ ~p

• p ∧ q

• ~p

The opposite of tautology is:

• Proposition

• Contradiction

• Negation

• Statement

p ∧ ~p is always:

• True

• False

• Sometimes True

• None

A contradiction has truth value:

• Always True

• Always False

• Sometimes True

• None

Which statement is always false?

• p ∨ ~p

• p ∧ ~p

• p

• q

Tautology is used to:

• Prove logical equivalence

• Add numbers

• Multiply numbers

• Divide numbers