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-# Logic
-
-TODO Manger at lave en summary.
-
-## Opgaver
-
-### 1.
-
-A) Yes, T
-B) Yes, T
-C) Yes, T
-D) Yes, T
-E) No
-F) No
-
-### UNKNOWN ORIGIN (12.)
-
-A) if you have the flu, you miss the final examination
-B) you pass the course if and only if you do not miss the final examination
-C) if you miss the final examination, you do not pass the course
-D) you have the flu, miss the final examination and pass the couse
-
-### 15. (13.)
-
-A) ¬p
-B) p ^ ¬q
-C) p -> q
-D) ¬p -> ¬q
-E) p -> q
-F) q ^ ¬p
-G) q -> p
-
-### 20. (18.)
-
-A) T
-B) T
-C) F
-D) T
-
-### UNKNOWN ORIGIN(31.)
-
-A)
-
-| p | ¬p | p ^ ¬p |
-| -- | -- | -- |
-| T | F | F |
-| F | T | F |
-
-B)
-
-| p | ¬p | p v ¬p |
-| -- | -- | -- |
-| T | F | T |
-| F | T | T |
-
-C)
-
-| p | q | p v ¬q | ( p v ¬q) -> q |
-| -- | -- | -- | -- |
-| T | T | T | T |
-| T | F | T | F |
-| F | T | F | T |
-| F | F | T | F |
-
-D)
-
-| p | q | ( p v q) -> ( p ^ q ) |
-| -- | -- | -- |
-| T | T | T -> T = T |
-| T | F | T -> F = F |
-| F | T | T -> F = F |
-| F | F | F -> F = T |
-
-E)
-
-| p | q | (p -> q) | (¬q -> ¬p) | (p -> q) <-> (¬q -> ¬p ) |
-| -- | -- | -- | -- | -- |
-| T | T | T | T | T |
-| T | F | F | F | T |
-| F | T | T | T | T |
-| F | F | T | T | T |
-
-F)
-
-| p | q | (p -> q) | ( q -> p ) | (p -> q) -> ( q -> p) |
-| -- | -- | -- | -- | -- |
-| T | T | T | T | T |
-| T | F | F | T | T |
-| F | T | T | F | F |
-| F | F | T | T | T |
-
-
-### (40. )
-
-All the paranterees must be true, they can be split up.
-
-r is in two parantesees ( q v ¬r ) and ( r v ¬p ).
-
-If r is true q must also be true for ( q v ¬p ).
-
-Therefore in ( p v ¬p ) p must also be true.
-
-Therefore it creates a kind of circle, that also works then one is false.
-
-### (44. )
-
-A)
-
- 01011
- 11011
-v-----
- 11011
- 11000
-^-----
- 11000
-
-B)
-
- 01111
- 10101
-^-----
- 00101
- 01000
-v-----
- 01101
-
-C)
-
- 01010
- 11011
-x-----
- 10001
- 01000
-x-----
- 11001
-
-D)
-
- 11011
- 01010
-v-----
- 11011
-
- 10001
- 11011
-v-----
- 11011
-
- 11011
- 11011
-^-----
- 11011
-
-
-### (7. )
-
-Already done this
-
-### (9. )
-
-The rest is just stupid.
-
-### (20. )
-
-| p | q | p x q | p <-> q |
-| -- | -- | -- | -- |
-| T | T | F | T |
-| T | F | T | F |
-| F | T | T | F |
-| F | F | F | T |
-
-The two last columns are the negatives of each other thus
-
-p x q = p <-> q
-
-
-