Homework Assignment 2
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School
University of Northwestern St. Paul *
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Course
1105
Subject
Philosophy
Date
Feb 20, 2024
Type
Pages
3
Uploaded by CoachRockWaterBuffalo24
Homework 2 Part I. Use the traditional square of opposition to provide the missing
truth values (See Unit 1 Section D from instructor notes). 1.
If “Some discarded facemasks are hazards to unwitting sea turtles” is true, what is the truth value of the following statements? All discarded facemasks are hazards to unwitting sea turtles. Truth value:______ No discarded facemasks are hazards to unwitting sea turtles. Truth value:______ Some discarded facemasks are not hazards to unwitting sea turtles. Truth value:______ Part II. Supply the
operation/relation, new statement
, and
truth value as indicated in the following questions (See Unit 1 Section D from instructor notes). Given
statement Operation/relation New statement Truth value
2.
No A are B (T) contraposition ____________ __________ 3.
All non-A are B (F) contrary ____________ __________ 4.
No non-A are B (F) _________________ Some non-A are not B ___________ 5.
Some non-B are A (F) ________________ All non-B are A ___________ Part III. Using the Traditional Square of Oppositions, determine the validity of the following argument (See Unit 1 Section D from instructor notes). 6.
All gnomes beneath the floorboards are plotting to raid the kitchen. Therefore, some gnomes beneath the floorboards are plotting to raid the kitchen. Part III. Identify the major, minor, and
middle terms
, as well as the
mood, figure and validity for each
of the following syllogisms (See Unit 1 Section E from instructor notes). 7.
All strange dreams are prognostications of future events. All strange dreams are events caused by eating too much frozen pizza. Therefore, some events caused by eating too much frozen pizza are prognostications of future events.
8.
All imps glowing with an inner fire are sneaky partisans All cats are imps glowing with an inner fire Therefore, all cats are sneaky partisans 9.
Some of your favorite fruits are fruits in this salad All fruits in this salad are delicious surprises Some delicious surprises are your favorite fruits Part IV. Reconstruct the following syllogistic forms from the following combinations of mood and figure (See Unit 1 Section E from instructor notes). 10.
AII-3
11.
OEI-3
Part V. Use the 5 rules to determine whether the following standard-form syllogisms are unconditionally valid
, conditionally valid
, or invalid.
Name any rule broken (see Unit 1 Section F from instructor notes). 12.
All charming rogues are smooth-talking liars. All smooth-
talking liars are ne’er
-do-wells with hearts of gold. Some ne’er
-do-wells with hearts of gold are charming rogues 13.
All cheese dips are foods forgotten at the back of the fridge. Some foods forgotten at the back of the fridge are molds releasing clouds of spores. Therefore, some molds releasing clouds of spores are cheese dips.
14.
Some fire engines are red. Some apples are red. Some apples are fire engines. 15.
No loaves of bread are causes of allergic reactions. Some berries are causes of allergic reactions. Therefore, no berries are loaves of bread. 16.
No sentences in this homework are statements worth caring about. Some statements worth caring about are not beliefs deeply held by the professor. Therefore, some beliefs deeply held by the professor are not sentences in this homework. 17.
All roughnecks are diligent employees. All uncouth scoundrels are roughnecks. Therefore, all uncouth scoundrels are diligent employees.
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