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WorksheetsPhil 109 4/8
Total questions: 4
Worksheet time: 2mins
Name
Class
Date
1.
What is the subcontrary of "Some vertebrates are not fish."
a)
Some fish are not vertebrates.
b)
Some vertebrates are fish.
c)
All vertebrates are fish.
d)
Some fish are vertebrates.
2.
If "Some vertebrates are not fish is true," what is the logical status of "Some vertebrates are fish"?
a)
True
b)
False
c)
Undetermined
3.
What is the contradictory of "No challenge is a waste of time"?
a)
All challenges are wastes of time.
b)
Some challenges are not wastes of time.
c)
Some challenges are wastes of time.
d)
No waste of time is a challenge.
4.
If "No challenge is a waste of time" is true, what is the logical status of "All challenges are a waste of time"?
a)
True
b)
False
c)
Undetermined
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