1. Opener a) Every cheerleader at Washington High School is a junior. Mark is a senior. Is Mark a cheerleader? b) Edith, Ernie, and Eva have careers as an economist, electrician, and engineer, but not necessarily in that order. The economist does consulting work for Eva’s business. Ernie hired the electrician to rewire his new kitchen. Edith earns less than the engineer but more than Ernie. Match names to occupations. c) What percent of a panda’s diet is bamboo? Day 100 1 99%; the other 1% is human flesh. Draw a picture of it next year. Gotta play the selected clip from the office for c).
Transcript
1. Opener a) Every cheerleader at Washington High School is a junior. Mark
is a senior. Is Mark a cheerleader?
b) Edith, Ernie, and Eva have careers as an economist, electrician, and engineer, but not necessarily in that order. The economist does consulting work for Eva’s business. Ernie hired the electrician to rewire his new kitchen. Edith earns less than the engineer but more than Ernie. Match names to occupations.
c) What percent of a panda’s diet is bamboo?
Day 100
1
99%; the other 1% is human flesh. Draw a picture of it next year. Gotta play the selected clip from the office for c).
2. Logic
All freshman are immature. Mark is a freshman.
Mark is immature.
2
Ask what the conclusion is.
2. Logic
All freshman are immature. Mark is not a freshman.
Mark is not immature.
3
Ask what the conclusion is.
2. Logic
All freshman are immature. Mark is not immature.
Mark is not a freshman.
4
Ask what the conclusion is.
2. Logic
All freshman are immature. Mark is not a freshman.
Mark is not immature.
5
Ask what the conclusion is.
2. Logic
All freshman are immature. Mark is not immature.
Mark is not a freshman.
6
Ask what the conclusion is.
2. Logic
P: The person is a freshman. Q: The person is immature.
All freshmen are immature.
If the person is a freshman then the person is immature.
If P then Q
P Q
7
2. Logic
Let P: I get a job. Let Q: I will earn money. Let R: I will go to the movies. Let S: I will spend my money.
Translate to English
1. If P then Q.
2. If Q then R.
3. If P then R.
4. If R then S.
If I get a job then I will earn money.
If I will earn money then I will go to the movies.
If I get a job then I will go to the movies.
If I will go to the movies then I will spend my money.
8
2. Logic
Let P: Today is Wednesday. Let Q: Tomorrow is Thursday. Let R: Friday is coming. Let S: Yesterday was Tuesday.
Translate to logic statements.
5. If today is Wednesday, then tomorrow is Thursday.
6. If tomorrow is Thursday, then Friday is coming.
7. If yesterday was Tuesday, then tomorrow is Thursday.
8. If yesterday was Tuesday, then Friday is coming.
If P then Q
If Q then R
If S then Q
If S then R
9
2. Logic
Let P: Today is Wednesday. Let Q: Tomorrow is Thursday. Let R: Friday is coming. Let S: Yesterday was Tuesday.
Translate to logic statements.
5. If today is Wednesday, then tomorrow is Thursday.
6. If tomorrow is Thursday, then Friday is coming.
7. If yesterday was Tuesday, then tomorrow is Thursday.
8. If yesterday was Tuesday, then Friday is coming.
P Q
Q R
S Q
S R
10
2. Logician’s Shorthand
Let P: The month is April. Let Q: The sun is shining. Let R: The moon is full. Let S: The night is young.
P Q If the month is April then the sun is shining.
~P The month is not April.
Therefore the night is young. S
If the moon isn’t full then the night is young.~R S
11
2. Logic
If a person is a freshman then the person is immature. Mark is a freshman. Therefore, Mark is immature.
12
Ask what the conclusion is.
3. Classwork
pg. 576 // #1 - 15
1. 2. 3. 4. 5. 6. 7. 8. 9.
P ~Q~Q RQ ~R~Q ~P~ (R S)~ (~P R)~Q PS R~(~S Q)
13
3. Classwork
pg. 576 // #1 - 15
10. If world peace is in jeopardy, then the destruction of civilization could result.
11. If the buildup of nuclear weapons continues, then international tensions will increase.
12. If international tensions are increased, then the destruction of civilization could result.
13. If world peace isn’t in jeopardy, then the buildup of nuclear weapons will stop.
14. It is not true that if world peace isn’t in jeopardy, then international tensions will increase.
15. It is not true that if the buildup of nuclear weapons stops, then the destruction of civilization won’t result.
14
1. Opener Is this good reasoning or bad reasoning?
a) If the month is May then it has 31 days. The month has 31 days. Therefore it is May.
b) If the month is May then it has 31 days. The month is May. Therefore it is May.
c) If the month is May then it has 31 days. The month does not have 31 days. Therefore it is not May.
d) When will Jim receive that disciplinary review?
e) What is the busiest calling holiday of the year? What is the busiest collect calling holiday?
