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The problem asks to determine the validity of the argument using a Venn diagram. The argument is as follows:

1. Some A are not B (Beberapa A bukan B).
2. All B are C (Semua B adalah C).
3. Conclusion: Some A are not C (Kesimpulan, beberapa A bukan C).

### Step-by-Step Analysis Using a Venn Diagram:

1. **First statement**: "Some A are not B" means that there is at least one element in set A that does not belong to set B.

2. **Second statement**: "All B are C" implies that the entire set B is a subset of set C. Every element in B is also an element in C.

3. **Conclusion**: "Some A are not C" suggests that some elements of set A are outside set C.

### Venn Diagram Representation:
- Let circle \( A \) represent set A.
- Let circle \( B \) represent set B, and circle \( C \) represent set C.
- Since "all B are C," circle \( B \) is entirely inside circle \( C \).
- The first statement, "some A are not B," means that part of set A lies outside set B, but we don't know its relation to C yet.

Now, for the conclusion to be valid, we need to determine whether there can be some elements in A that are outside C.

### Conclusion Verification:
The second premise, "All B are C," does not restrict whether elements outside B (which can be part of A) are inside or outside C. Therefore, it is possible for some elements of A to be outside C. This makes the conclusion logically valid.

The argument is **valid**, because it is possible, based on the premises, for some elements of A to not be in C.

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Do you want further details or have any questions?

Here are 5 related questions:
1. What is a Venn diagram and how is it used in logical reasoning?
2. Can you explain the difference between "some" and "all" in set theory?
3. How do you prove the validity of an argument using logical statements?
4. What are the common types of logical fallacies in reasoning?
5. How can we apply Venn diagrams in solving complex set problems?

**Tip:** When working with Venn diagrams, always visualize how the sets overlap based on the given premises. It helps in determining the validity of conclusions easily.

Determine the validity of the argument using quantifiers with a Venn diagram: 'Some A are not B, all B are C. Conclusion: Some A are not C.'

Explore the logical reasoning problem involving sets A, B, and C using Venn diagrams to determine argument validity. This problem focuses on understanding subset relationships in set theory and is suitable for students in Grades 10-12.

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