proposition

What logical connective uses this (¬) symbol?

• Implication

• Negation

• Conjunction

It is a formula which is always false for every value of its propositional variables

• Contingency

• Tautology

• Contradiction

It is a formula which is always True for every value of its propositional variables

• Tautology

• Contradiction

• Contingency

"Close the door."

• Proposition

• Not proposition

If you keep trying, then you will succeed.

• conditional

• biconditional

• negation

• conjunction

Contingency is a formula which is always true for every value of its propositional variables

• True

• False

What will be the truth value of P ∧ Q

if P = True and Q = False?

• True

• False

"Fish can fly."

• Proposition

• Not proposition

"x is greater than 2"

• Proposition

• Not proposition

Which of the following is NOT an example of a proposition?

• Cell is the smallest unit of life.

• $1+2=5$

• They are a great couple.

• $x+y=4$