day 8
Discussion:
What makes a good school?
Rate the Gray for each statement on a scale of 1­10.
4. The Teachers
a. Are teachers teaching in their area of expertise?
b. How many teachers are involved in extra­curricular student activities?
c. Is there mutual respect between staff and students?
d. Do teachers enjoy teaching?
e. Do teachers demonstrate enthusiasm for their subject area?
f. Are classes run effectively? Are students on­task most of the time?
g. Are the guidance counsellors connected and involved with the students?
h. Are the guidance counsellors effective at helping students?
hw: p114#1-4
p109#48, 50, 52
5. Music
a. What % of students are in the school band?
b. Has the band won recent awards?
c. How often does the band perform at public events?
d. How many different bands/ensembles are there in the school?
e. Are there barriers to student participation in the music program?
Deductive Reasoning (2.4)
day 8
p120
Deductive Reasoning (2.4)
day 8
p120
ex2: Is this a valid argument?
ex1: Construct a truth table for
Your dog will tear up the flower bed if it is left loose.
The flowers have been torn up.
∴ someone left the dog loose.
this is the law of detachment
if p⇒q is true, and p is true,
then q is true
Deductive Reasoning (2.4)
ex3: Are these arguments valid?
p120
day 8
if the conditional is true
a) If you go out in the sun, you will get a burn.
I'm going out in the sun.
∴ I will get a burn.
b) If you copy an assignment, you will get a zero.
Lisa got a zero.
∴Lisa copied her assignment.
c) A car will not start if it's out of gas.
My car will not start.
∴It is out of gas.
d) You get in trouble when you skip.
Dave skipped.
∴Dave got in trouble.
#17,19,21
Deductive Reasoning (2.4)
p120
day 8
ex4: Are these examples of inductive or deductive
reasoning?
a) You notice that your neighbour leaves for work every
weekday at 7:45. You conclude that he's probably leaving
tomorrow at 7:45.
b) You know your neighbour works in town. You know
that it takes 20 minutes to drive to town. Most people start
work at 8am. You conclude that he's probably leaving the
house tomorrow at 7:40.
11, 13, 15
1
day 8
Deductive Reasoning (2.4)
p120
day 8
deductive reasoning uses facts, rules, etc. to
reach logical conclusions based on given
information
Deductive Reasoning (2.4)
p120
day 8
make up a valid argument about 20+ cm of
snow and school being cancelled.
inductive reasoning uses repeated observations
to reach conclusions based on patterns.
Deductive Reasoning (2.4)
p120
day 8
hw: 11-27 odd, 45, 47, 49, 51, 58, 63
2