In this syllogism question with quantifiers, two statements are given about crops, machines and fools. Treat both statements as true and then decide which of the conclusions, if any, logically follow: Statements: (I) Most crops are machines. (II) Some machines are fools. Conclusions: (I) Some fools are machines. (II) Some crops are fools.

Difficulty: Medium

Correct Answer: Conclusion I follows

Explanation:


Introduction / Context:
This question uses deliberately absurd categories crops, machines and fools to force you to think purely about logical form. One statement uses the word most, and the other uses some. You must analyse these to decide which of the two conclusions must follow logically if the statements are true.


Given Data / Assumptions:

  • Statement I: Most crops are machines.
  • Statement II: Some machines are fools.
  • Conclusion I: Some fools are machines.
  • Conclusion II: Some crops are fools.
  • Most crops are machines implies that at least some crops are machines.


Concept / Approach:
The phrase some machines are fools means there is at least one element that belongs to both machines and fools. This alone is enough to derive that some fools are machines, because the overlap is symmetric. The statement most crops are machines tells us that many crops lie in the machines set, but it does not specify any direct connection between crops and fools. We need to test whether we are forced to have an overlap between crops and fools, or whether that overlap is optional.


Step-by-Step Solution:
Step 1: Interpret statement II. Some machines are fools means that machines ∩ fools is non empty. So there is at least one object that is both a machine and a fool. Step 2: Conclusion I, some fools are machines, is just the same overlap described from the other side. Since some machines are fools, it is equally true that some fools are machines. Step 3: Therefore conclusion I must follow from statement II alone, regardless of what statement I says. Step 4: Now interpret statement I. Most crops are machines indicates that more than half of all crops are in the machines set. At minimum, it implies that there are some crops that are machines. Step 5: To get conclusion II, some crops are fools, we would need at least one element that is both a crop and a fool. Step 6: Even though some machines are fools and many crops are machines, it is still possible that none of the machines that are crops are the same machines that are fools. The sets crops and fools can still be disjoint while both statements remain true.


Verification / Alternative check:
Construct a simple example. Let machines be {m1, m2, m3, m4}, crops be {m1, m2} and fools be {m3}. Then most crops (both m1 and m2) are machines, so statement I holds. Some machines (m3) are fools, so statement II also holds. However, there is no object that is both a crop and a fool, so conclusion II fails. At the same time, some fools are machines is true because m3 is both a machine and a fool, so conclusion I holds. This confirms that conclusion I is forced, but conclusion II is not.


Why Other Options Are Wrong:
Option B chooses only conclusion II, ignoring the direct equivalence between some machines are fools and some fools are machines. Option C says neither conclusion follows, but conclusion I must hold whenever statement II is true. Option D claims both follow, but example constructions show that crops and fools can remain disjoint. Option E suggests that exactly one of them follows without specifying, but you are expected to identify conclusion I as the specific valid conclusion.


Common Pitfalls:
Students often confuse most with all and think that if most crops are machines and some machines are fools, then some crops must be fools. This is not logically guaranteed because the overlapping part between machines and fools might lie entirely outside the subset of machines that are crops. Another common error is to overlook simple symmetric rephrasing, as in moving from some machines are fools to some fools are machines.


Final Answer:
The correct logical outcome is that only conclusion I follows from the given statements.

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