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LIAR’S PARADOX
/ C P / P R E S E N T A T I O N
LIAR’S PARADOX IS AN
ARGUMENT THAT ARRIVES AT
THE CONTRADICTION BY
REASONING ABOUT A LIAR
SENTENCE
THE MOST CLASSIC OF THEM ALL IS THE SELF-REFERENTIAL SENTENCE BY
SAYING ‘ THIS SENTENCE IS FALSE’ YOU BASICALLY SAID THAT YOU ARE
NOW LYING
IS THIS SENTENCE TRUE OR FALSE
“THIS SENTENCE IS FALSE”
?
IF YOU WANT TO KNOW WHAT IS THE
ANSWER OF THIS QUESTION YOU NEED
TO KNOW FIRST WHAT IS PARADOX
WHILE CONTRADICTION IS THE SENTENCE THAT YOU ALL KNOW THAT IT IS
NOT TRUE, PARADOX CAN BE TRUE OR FALSE EVEN BOTH TRUE AND FALSE
AT THE SAME TIME
“THIS SENTENCE IS FALSE”
IS FALSE
IS TRUE ≡
≡
FALSE
TRUE
/ N O T P O S S I B L E / / A T S A M E T I M E /
T
F
“THIS SENTENCE IS FALSE”
THIS SENTENCE THIS SENTENCE IS FALSE
1 2
1 “THIS SENTENCE IS FALSE”
THIS SENTENCE
; THIS SENTENCE = THIS SENTENCE
∴ THIS SENTENCE = ANYTHING
“ IS FALSE”
“ IS FALSE”
2 “THIS SENTENCE IS FALSE”
THIS SENTENCE IS FALSE
; THIS SENTENCE = THIS SENTENCE IS FALSE
“[THIS SENTENCE IS FALSE] IS FALSE”
“[[THIS SENTENCE IS FALSE] IS FALSE] IS FALSE”
“[[[THIS SENTENCE IS FALSE]IS FALSE] IS FALSE] IS FALSE”
“[[[[……]IS FALSE]IS FALSE] IS FALSE] IS FALSE”
≡
≡
≡
≡
F A L S E
T R U E
T R U E
?
/ I T I S /
/ L O O P O F U N D I F Y T E R M /
T R U E F A L S E
U
ANSWER B O T H
N E I T H E R
T R U E > F A L S E
F A L S E > T R U E
REFERENCE
h t t p : / / w w w . i e p . u t m . e d u / p a r - l i a r /
h t t p s : / / p l a t o . s t a n f o r d . e d u / e n t r i e s / l i a r - p a r a d o x /
h t t p s : / / w w w . y o u t u b e . c o m
/ THANK YOU /

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Liar’s paradox

  • 1. LIAR’S PARADOX / C P / P R E S E N T A T I O N
  • 2. LIAR’S PARADOX IS AN ARGUMENT THAT ARRIVES AT THE CONTRADICTION BY REASONING ABOUT A LIAR SENTENCE THE MOST CLASSIC OF THEM ALL IS THE SELF-REFERENTIAL SENTENCE BY SAYING ‘ THIS SENTENCE IS FALSE’ YOU BASICALLY SAID THAT YOU ARE NOW LYING
  • 3. IS THIS SENTENCE TRUE OR FALSE “THIS SENTENCE IS FALSE” ?
  • 4. IF YOU WANT TO KNOW WHAT IS THE ANSWER OF THIS QUESTION YOU NEED TO KNOW FIRST WHAT IS PARADOX WHILE CONTRADICTION IS THE SENTENCE THAT YOU ALL KNOW THAT IT IS NOT TRUE, PARADOX CAN BE TRUE OR FALSE EVEN BOTH TRUE AND FALSE AT THE SAME TIME
  • 5. “THIS SENTENCE IS FALSE” IS FALSE IS TRUE ≡ ≡ FALSE TRUE
  • 6. / N O T P O S S I B L E / / A T S A M E T I M E / T F
  • 7. “THIS SENTENCE IS FALSE” THIS SENTENCE THIS SENTENCE IS FALSE 1 2
  • 8. 1 “THIS SENTENCE IS FALSE” THIS SENTENCE ; THIS SENTENCE = THIS SENTENCE ∴ THIS SENTENCE = ANYTHING “ IS FALSE” “ IS FALSE”
  • 9. 2 “THIS SENTENCE IS FALSE” THIS SENTENCE IS FALSE ; THIS SENTENCE = THIS SENTENCE IS FALSE “[THIS SENTENCE IS FALSE] IS FALSE” “[[THIS SENTENCE IS FALSE] IS FALSE] IS FALSE” “[[[THIS SENTENCE IS FALSE]IS FALSE] IS FALSE] IS FALSE” “[[[[……]IS FALSE]IS FALSE] IS FALSE] IS FALSE” ≡ ≡ ≡ ≡ F A L S E T R U E T R U E ?
  • 10. / I T I S / / L O O P O F U N D I F Y T E R M /
  • 11. T R U E F A L S E U ANSWER B O T H N E I T H E R T R U E > F A L S E F A L S E > T R U E
  • 12. REFERENCE h t t p : / / w w w . i e p . u t m . e d u / p a r - l i a r / h t t p s : / / p l a t o . s t a n f o r d . e d u / e n t r i e s / l i a r - p a r a d o x / h t t p s : / / w w w . y o u t u b e . c o m