Logical Fallacies
Critical Thinking
Unit Conversions
Numbers and Percentages
100
What logical fallacy is present?
Two people are shown falling in love while wearing a certain brand of jeans.
Appeal to emotion
100
What is the premise of this argument?
Toyota trucks are the best because a lot of people have Toyota trucks.
A lot of people have Toyota trucks
100
You can buy a 25lb bag of flour for $11 or you can buy a 3lb bag of flour for $1.17. Compare the per pound cost for the large and small bags.
Large bag: $0.44/lb
Small bag: $0.39/lb
100
Write 3.2X10-6 in ordinary notation.
0.0000032
200
What fallacy is present?
The mayor of a large city proposes the decriminalizing drug possession in order to reduce overcrowoding in jails and save money on enforcement. His challenger in the upcoming election says "The mayor doesn't think thre's anything wrong with drug use, but I do."
Straw man
200
Jose had 6 bagels and ate all but 4 of them. How many bagels were left?
4
200
How many seconds are in a day?
86,400 seconds
200
Will is 22% taller than Wanda, so Will's height is ____% of Wanda's height.
122%
300
What logical fallacy is present in this argument?
You don't support the principal so you have no school spirit.
Limited choice
300
Is it possible for a man to marry his widow's sister? Why or why not?
No; if a man has a widow, then he himself is dead.
300
How many square yards of carpet do you need to carpet a room that measures 10 feet by 12 feet?
13.3 yd2
300
Find the absolute and relative change.
The average sale price of a house in the US decreased from $301,000 in February 2008 to $152,000 in February 2013.
Absolute:-$149,000
Relative: -49.5%
400
What fallacy is present?
My little boy loves dolls and my little girls loves trucks, so there's no truth to the claim that boys are more interested in mechanical toys while girls prefer maternal toys.
Hasty generalization
400
A large barrel is filled with 8 different kinds of fruit. How many individual fruits must you remove from the barrel (without looking) to be certain that you have two of the same fruit?
9
400
As you ride an exercise bike, the display states that you are using 500 calories per hour. How much energy are you using in joules per second? 1 cal=4184 J
581 joules/sec
400
Of those with the disease, what percent tested positive?
90%
500
What fallacy is present?
Society has an obligation to provide health insurance because halth care is a right of citizenship.
Circular reasoning
500
Half of the people at a party are women and half of the people at the party love chocolate. Does it follow that one quarter of the people at the party are women who love chocolate? Why or why not?
No; it is possible that the two halves are separate groups, or that there is more overlap between women and chocolate lovers.
500
Assume that when you take a bath, you fill a tub to the halfway point and the tub measures 6ft by 3ft by 2.5ft. When you take a shower, you use.a shower head with a flow rate of 1.75 gallons per minute and you typically spend 10 minutes in the shower. There are 7.5 gallons in one cubic foot.
How long would you need to shower in order to use as much water as you use taking a bath?
96 min
500
What percent tested negative or did not have the disease?
98.65%