Truth table rules

Question 1

Some true, some false

Answer 1

Contingent

Question 2

x = y (or when x is not equal to y)

Always true

Answer 2

Tautology

Question 3

All false

Answer 3

Contradiction

Question 4

&

Answer 4

Conjunction

True only when both conjuncts are true

Question 5

V

Answer 5

Disjunction

True when at least one conjunct is true

Question 6

>

Answer 6

Conditional

False when the antecedent is true and conclusion is false

Question 7

<>
or
///

Answer 7

Biconditional

true whenever both conditionals have the same value (t/f)

Question 8

Logically equivalent

Answer 8

Same truth value under the same circumstances between two equations