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Philosophy
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Introduction to Formal Logic with Philosophical Applications
Quiz 5: Full First-Order Logic
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Question 241
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -Elizabeth is the most exalted woman in Britain.
Question 242
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -No one in Britain is more exalted than Charles, except Elizabeth.
Question 243
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -All people in Britain shop at Tescos, except Elizabeth.
Question 244
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -No one who shops at Tescos is more exalted than Charles.
Question 245
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -Charles and his two sons are not the most exalted people in Britain.
Question 246
Short Answer
use: b: Britain c: Charles e: Elizabeth t: Tescos Px: x is a person Qx: x is a Queen of England Wx: x is a woman Exy: x is more exalted than y Ixy: x is in y Pxy: x shops at y Sxy: x is a son of y -Any son of Elizabeth or Charles is more exalted than anyone who is not Charles or Elizabeth.
Question 247
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -Megha's only brother is Bhavin.
Question 248
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -Everything is joyful, except Megha and Bhavin.
Question 249
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -If one thing is smarter than another, then the two things aren't the same.
Question 250
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -Exactly three Russian philosophers are joyful.
Question 251
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -The smartest Russian mocks Chloe and Bhavin.
Question 252
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -There are at most two Russian altruists
Question 253
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -Some Russian philosopher other than Chloe is an altruist.
Question 254
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -The richest philosopher is smarter than any of Chloe's brothers.
Question 255
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -All thoughtful philosophers except Nietzsche are altruists.
Question 256
Short Answer
use: b: Bhavin c: Chloe m: Megha n: Nietzsche p: Plato Ax: x is an altruist Jx: x is joyful Px: x is a philosopher Rx: x is Russian Tx: x is thoughtful Bxy: x is a brother of y Mxy: x mocks y Rxy: x is richer than y Sxy: x is smarter than y -Exactly three philosophers mock Plato and Nietzsche.
Question 257
Essay
derive the conclusions of each of the following arguments using the rules of inference for F, including the rules for identity. -1. (?x)(Ax • Bx • Cax) 2. (?x)[(Ax • Cax) ? x=d] / Bd
Question 258
Essay
derive the conclusions of each of the following arguments using the rules of inference for F, including the rules for identity. -1. Fab • (?x)(Fax ? x=b) 2. ?Fac / b?c
Question 259
Essay
derive the conclusions of each of the following arguments using the rules of inference for F, including the rules for identity. -1. (∃x)(∃y)(Dx • Exb • Dy • Eyb • x≠y) 2. (∀x)(Dx ⊃ Ebx) / (∃x)(∃y)(Ebx • Exb • Eby • Eyb • x≠y)