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LAS101: Critical Thinking, Reading, and Writing
Lesson 14 — Activity 4B: Standard Categorical Syllogism & Venn Diagrams
Lesson: 12
Section: ……
Group (Letter): E
No. in the Group: 2
1D: 6622772422
Full Name: Nonprewich Intakreu
Group Score: …… / 2.5
13. A. Complete the syllogism
Insert the correct missing propositions. Follow the given mood and figure. Each item = 0.1 pt.
Figures of Standard Categorical Syllogisms (SCS)
1. IAI-3
- Premise 1 (Given): Some Bene Gesserits are entities from Atreides.
- Premise 2 (Given): All Bene Gesserits are mind-controlling beings.
- Conclusion: Some entities from Atreides are mind-controlling beings.
2. ABE-4
- Premise 1: No M2-chip dupes are Apple instruments.
- Premise 2 (Given): No Apple instruments are devices made with semiconductors from Rangsit.
- Conclusion (Given): No M2-chip dupes are devices made with semiconductors from Rangsit.
3. EAE-1
- Premise 1 (Given): No items sold at Talad Chiangrak are expensive goods.
- Premise 2:
- Conclusion (Given): No Asian thrift products are expensive goods.
4. IAI-4
- Premise 1 (Given): Some tracking gadgets are devices on Apple’s operating system.
- Premise 2 (Given): All devices on Apple’s operating system are overpriced items.
- Conclusion:
5. OAO-3
- Premise 1:
- Premise 2 (Given): All Deatheaters are dark wizards.
- Conclusion (Given): Some dark wizards are not Slytherin members.
13. B. Construct Valid Syllogisms
Follow the given mood, figure, and terms. Double-underline the distributed terms. Indicate which rules are followed.
6. AII-3
S: frozen products
P: imported vegetables
M: damaged items
Form (AII-3):
-
Premise 1 (A): All M are P.
-
Premise 2 (I): Some S are M.
-
Conclusion (I): Some S are P.
Completed Syllogism:
-
All damaged items are imported vegetables.
-
Some frozen products are damaged items.
-
∴ Some frozen products are imported vegetables.
Rule Followed: (✓) 1, (✓) 2, (✓) 3, (✓) 4, (✓) 5
7. AEE-4
S: 7-11 colognes
P: niche perfumes
M: expensive scents
Form (AEE-4):
-
Premise 1 (A): All P are M.
-
Premise 2 (E): No M are S.
-
Conclusion (E): No P are S.
Completed Syllogism:
-
All niche perfumes are expensive scents.
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No expensive scents are 7-11 colognes.
-
∴ No niche perfumes are 7-11 colognes.
Rule Followed: (✓) 1, (✓) 2, (✓) 3, (✓) 4, (✓) 5
13. C. Mood, Figure, Diagram, and Validity
8. Argument 1
Original Argument
-
All followers of Bangtan are fans called ARMY.
-
Some BTS haters are not fans called ARMY.
-
∴ Some BTS haters are not followers of Bangtan.
Simplified Using S, P, M
-
M: followers of Bangtan
-
P: fans called ARMY
-
S: BTS haters
Mood & Figure
-
Premise 1: A (M → P)
-
Premise 2: O (S → ¬P)
-
Conclusion: O (S → ¬M)
Mood: A O O
Figure: 1 (M–P, S–M)
Validity (Venn Diagram Result):
Valid.
The O-premise places S outside P.
Since all M are inside P, anything outside P is also outside M.
Thus the conclusion follows.
9. Argument 2
Original Argument
-
All group tasks are easy assignments.
-
No group tasks are A+ projects.
-
∴ No A+ projects are easy assignments.
Simplified Using S, P, M
-
M: group tasks
-
P: easy assignments
-
S: A+ projects
Mood & Figure
-
Premise 1: A (M → P)
-
Premise 2: E (M ↛ S)
-
Conclusion: E (S ↛ P)
Mood: A E E
Figure: 1 (M–P, S–M)
Validity
Valid.
Standard valid form AEE-1:
All M are P
No M are S
∴ No S are P
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