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A deductive argument stated in a three-part form is called a ...
What logical fallacy is found below?
To allow every man an unbounded freedom
of speech is advantageous to the state for it is
conducive to the community that each person
should enjoy liberty of expression.
A. pathetic fallacy
B. assumed inverse
C. ignoratio elenchi
D. false assumptions
E. begging the question
Given this data, who is fastest?
Groucho is faster than Zeppo. Gummo
is faster than Chico. Harpo is faster than
Groucho. Chico is faster than Harpo.
Which statement is self-contradictory?
A. No old men are young.
B. All writers are females.
C. All rules have exceptions.
D. No apples have green stems.
E. All squares are quadrilaterals.
What's the conclusion?
Babies are illogical.
Nobody is despised who can manage a yeti.
Illogical persons are despised.
A. Yetis are illogical.
B. Babies are nobody.
C. Nobody is illogical.
D. Yeti managers are babies.
E. Babies cannot manage yetis.
All retired men are old.
What is the converse of this statement?
All old men are retired.
Which relationship is, in a mathematical sense, symmetrical?
A. Alfonzo is older than Alice.
B. Alfonzo is the brother of Alice.
C. Alfonzo lives next door to Alice.
D. Alfonzo is a descendent of Alice.
E. Alfonzo is at least as tall as Alice.
All dingos have hair.
Translate this statement into an "All ..." form useful in deductive logic.
If it is a dingo, then it has hair.
H, I, J
Name three letters that are the first half of the last six of the thirteen letters in the first half of the alphabet.
Disjunction is illustrated by which choice?
A. She is either Nell or Natasha.
B. Mr. Peabody is not a Mountie.
C. No squirrel's goggles are green.
D. Bullwinkle has antlers and fleas.
E. Boris and Natasha are from abroad.
What category of reasoning is used below?
Don is not rich. All movie stars are extremely
wealthy. Therefore, Don is not a movie star.
birds wear galoshes
What words comprise the consequent in this statement?
Birds wear galoshes if the mountains are
inversely proportional to their colors or small
children carry anvils while watching television.
As I was going to St. Ives,
I met a man with seven wives.
Every wife had seven sacks.
Every sack had seven cats.
Every cat had seven kits.
Kits, cats, sacks, wives --
How many were going to St. Ives?
What fallacy is illustrated below?
All Venezuelans are humans.
All Vietnamese are humans.
So all Venezuelans are Vietnamese.
B. circular reasoning
C. assumed converse
D. undistributed middle
E. argument ad hominem
Which is a conditional statement?
A. I'll go if I get you a wig.
B. I'll go or I'll get you a wig.
C. I'll go and I'll get you a wig.
D. I'll go but I won't get you a wig.
E. I'll not go nor will I get you a wig.
A posteriori reasoning indicates judgments based on experience and experiment. What form of reasoning is deductive and not based on experience but only on a theory or hypothesis?
Which statement is not true?
A. 3 > 8 or 5 < 7
B. 4 - 1 = 3 and 9 - 2 = 6
C. 5 + 6 = 12 or 9 + 2 = 11
D. 3 x 2 = 6 and 6 x 3 = 18
E. 4 + 3 = 7 or 1 + 6 = 8 or 5 + 1 = 6
60% of a population had tried brand X. 50% had tried brand Y. 20% had tried both. What percentage of the population had tried neither?
Alf, Bo, and Cal are either forwards or guards. Alf and Bo have the same position. Alf and Cal have different positions. If Cal is a guard, then so is Bo. What is Alf's position?
Which word is least inclusive?
D. the Bennetts
E. North Americans
What kind of definition is illustrated below?
A point is a spot. A spot is a place.
A place is an exact location. An exact
location is a spot. A spot is a point.
A logical proposition is illustrated by which choice?
A. Let's do the twist.
B. Help me, Rhonda.
C. Good morning starshine.
D. Do you know the way to San Jose?
E. The rain in Spain stays mainly on the plain.
"All" and "no" are two of the three quantifiers used in Venn diagrams. What is the other?
Jake has five sisters and each of his sisters has a brother. What is the minimum number of children that Jake's parents had?
Who invented the syllogism as the keystone of his system of deductive logic?
C. George Boole
D. Sir Francis Bacon
E. Nicholas Lobachevsky
No economists are soothsayers
Use "economists" as the first term and "soothsayers" as the second term and state a universal negative proposition.
Which is a conjunctive statement?
A. No vampire likes mirrors.
B. The Blob is slimy or molten.
C. All werewolves prefer full moons.
D. Frank is hairy and Mothra is huge.
E. It was an incredibly tiny behemoth.
A fundamental principle in logic is that a statement and the denial of the statement cannot both be true. This is the law of ...
What is the conclusion of these premises?
All thingamajigs are dealios.
Some dohickies are thingamajigs.
A. No dealios are dohickies.
B. All dohickies are dealios.
C. Some dohickies are dealios.
D. All dealios are thingamajigs.
E. All thingamajigs are dohickies.
This illustrates which of the two major categories of reasoning?
Ijon met 15 different aliens from the
planet Zamba and each had a face like
Mr. Potato Head. He surmised that the
next Zamban would also have such a face.
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Answers to Reasoning
6. All retired men are old.
8. All dingos have hair.
9. H, I, J
12. birds wear galoshes
16. a priori
26. No economists are soothsayers
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