are words that tell us how many

a quantifier indicating that the sentential function within its scope is true for at least one value of the variable included in the quantifier

convey the idea of totality

use in constructing arguments

is a statement that is always true

is a statement that is always false

a compound proposition that is neither tautology nor contradiction

compound propositions that have the same truth values in all possible cases

the first of the three classical laws of thought. It states that each thing is the same with itself and different from another.

the truth value is the most important, powerful, or influential