POWER_OF_LOGIC_6TH_EDITION_HOWARD_SNYDER_SOLUTIONS_MANUAL_FINAL

POWER OF LOGIC 6TH EDITION HOWARD
SNYDER SOLUTIONS MANUAL FINAL
PAPER 2026 FULL SOLUTION WITH
VERIFIED ANSWERS GRADED A+

⩥ Samuel Morse invented the telegraph. Alexander Graham Bell did not
invent the telegraph. Consequently, Morse is not identical with Bell.
valid or invalid. Answer: valid argument. If they were identical there
would be just one person, who could not have invented and not invented
the telegraph.


⩥ All cats are mammals. All mammals are animals. So, all cats are
animals.
sound or unsound. Answer: sound


⩥ All collies are dogs. Some animals are not dogs. So, some animals are
not collies.
sound or unsound. Answer: sound. An argument that is valid and has all
true premises is sound.


⩥ All citizens of Nebraska are Americans. All citizens of Montana are
Americans. So all citizens of Nebraska are citizens of Montana.
sound or unsound. Answer: unsound

,⩥ "Let's party!" is either a sentence or a statement (or both). "Let's
party!" is a sentence. So, "Let's party!" is not a statement.
sound or unsound. Answer: unsound


⩥ No diamonds are emeralds. The Hope Diamond is a diamond. So the
Hope Diamond is not an emerald.
sound or unsound. Answer: sound


⩥ All the planets are round. The earth is round. So, the earth is a planet.
sound or unsound. Answer: unsound.


⩥ If the Taj Mahal is in Kentucky, then the Taj Mahal is in the U.S.A.
But the Taj Mahal is not in the U.S.A. So, the Taj Mahal is not in
Kentucky.
sound or unsound. Answer: sound


⩥ All women are married. Some executives are not married. So some
executives are not women.
sound or unsound. Answer: unsound


⩥ All mammals are animals. No reptiles are mammals. So, no reptiles
are animals.
sound or unsound. Answer: unsound

, ⩥ All mammals are cats. All cats are animals. So, all mammals are
animals.
sound or unsound. Answer: unsound


⩥ Wilbur Wright invented the airplane. Therefore, Orville Wright did
not invent the airplane.
sound or unsound. Answer: unsound. Not valid because of the
possibility of co-inventors


⩥ All collies are dogs. Hence, all dogs are collies.
sound or unsound. Answer: unsound


⩥ William Shakespeare wrote Hamlet. Leo Tolstoy is identical with
William Shakespeare. It follows that Leo Tolstoy wrote Hamlet.
sound or unsound. Answer: unsound


⩥ If San Francisco is in Saskatchewan, then San Francisco is in Canada.
But it is not true that San Francisco is in Saskatchewan. Hence, it is not
true that San Francisco is in Canada.
sound or unsound. Answer: unsound. The premises are true but the
reasoning is invalid.