Flashcards in Logic Exam Deck (77)

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1

## What does the symbol " ^ " mean

### AND

2

## What does the symbol " v " mean

### OR

3

## What does the symbol " ¬ " mean

### NOT

4

## What does the symbol " ----> " mean

### IMPLIES

5

## What does the symbol " " mean

### IMPLIES (BOTH WAYS)

6

## What does the symbol " ∴ " mean

### Therefor

7

## What does the symbol " ≡ " mean

### Equivalent to

8

## What is the first priority of the truth table

### Parenthesis

9

## What is the second priority of the truth table

### Nots

10

## What is the third priority of the truth table

### Ands

11

## What is the fourth priority of the truth table

### Ors

12

## How would you approach filling the truth table values for P if there are only 2 variables:

###
P alternates every 2 values.

ex: T T F F

13

## How would you approach filling the truth table values for Q if there are only 2 variables

###
Q alternates every 1 value

ex: T F T F

14

## How would you approach filling the truth table values for p if there are 3 variables

###
P alternates every 4 values

ex: T T T T F F F F

15

## How would you approach filling the truth table values for q if there are 3 variables

###
Q alternates every 2 values

ex: T T F F T T F F

16

## How would you approach filling the truth table values for r if there are 3 variables

###
R alternates every 1 values

ex: T F T F T F T F

17

## How would you approach solving proofs

### Start with most complicated side first

18

## What do you do if you see an " Or "

### If there is one thing thats true then it is all true

19

## What do you do if you see an " And "

### If there is one thing that is false then it is all false

20

## What is a tautology

### A formula that is true in every interpretation

21

## What does " Ǝ " mean

### At least one (there exists)

22

## What does " ∀ " mean

### For all (everyone)

23

##
Solve this:

~(~P) ≡

### P

24

##
Solve this:

P v ~P ≡

### True

25

##
Solve this:

P ^ ~P ≡

### False

26

##
Solve this:

P v T ≡

### True

27

##
Solve this:

P v F ≡

### P

28

##
Solve this:

P ^ T ≡

### P

29

##
Solve this:

P ^ F ≡

### False

30